A kangaroo is a marsupial animal, characterized by very strong hinder legs, wielding them like a crowbar, and a "stiff" tail - like a lever - which is probably why kangaroo is called so:
Name kangaroo must belong to the following semantic field:
[kanaaq] (Inuit) - lower part of leg; [kingmik] (Inuit) - heel: source - http://paabo.ca/uirala/contents.html (*)
hanka (Burushaski, the language of the ethnic isolate group of Burishians living in the mountainous regions of Hunza and Nagar in the north of Kashmir) - leg, foot;
shank (Eng.) - a shin, a rod, leg, stalk (SIC per British etymologists, shin is allegedly from a hypothetic "proto-I.E." verb *skei- 'to cut, to split');
cẳng (Viet.) - forearm, foot; chân (Viet.) - leg, foot;
ขา [K̄hā] (Thai) - leg, foot;
长 [cháng] (Chin.) - long;
chang (Araucanian language of Mapuche Indians in Argentina) - leg, foot.
chunk (Eng.) - a short thick piece, log, block; a thick end;
kang, gen. kangi (Est.), kanki (Fin.), kangi (Izhorian, Karel., Chudi), kanģ (Vepsian) - a lever, crowbar, bar, ingot;
kang- (Est.) - adj. (of) lever;
kanguta(ma) (Est.), kangeta (Fin.) - screw out, screw in (using the lever), push out, pull out; kangur, gen. kangru (Est.), kankuri (Fin.) - weaver, who performs the specified manipulations with a spindle.
kange (Est.), kanktõ (Livonian), kankõa (Votic), kankea (Fin.), kankia (Izhor.), kanged (Veps.) - ossified, hardened, solid, inflexible; strong, tight, stiff, stubborn;
kangestu(ma) (Est.), kaŋkstomo(ms) (Erzia) - to ossify, to harden, to stiffen;
киӈкэ [kingke] (Orochi language in the Far East) - hardened, strong; a stone;
Comp. kana (Etruscan) - a statue;
Comp. kanaga - a wooden idol, symbol of Dogonians (Mali, Western Africa): https://anti-fasmer.livejournal.com/179240.html ;
Comp. hane (Tungusic) - an idol;
Comp. खांग [khaang] (Hindi) - a fang;
Comp. 堅果 [kenka] (Jap.), 견과 [gyeongwa] (Korean), жаңгак [zhangak] (Kyrgyz), жаңғақ [zhanghakh](Kazakh) - a nut;
Comp. գանգը [qanqe] (Armenian) - a skull, a cranium.
(thus, any bone, ossified limb can exist with this stem - both a leg, a foot - and a skull);
Comp. cancro (Ital.), cancer (Lat., Eng.) - both an arthropod with carapace, and a tumor - which, according to mainstream etymologists, is allegedly from καρκίνος [karkinos] (Gr.), with the same meaning, without explanation of the phonetic transition, and with a further reference to a hypothetic 'PIE' *kar ('hard'): https://www.etymonline.com/word/cancer ;
Comp. cancrena (It.), gangrene (Eng.), gangraena (Lat.) - allegedly from Greek with a literal meaning of 'that which eats away' - https://www.etymonline.com/word/gangrene ;
Comp. concrete (Eng.), concretus (Lat.) - condensed, hard, frozen, clotted - per mainstream etymologists, allegedly from Latin 'con + concrescere' ('grow together'): https://www.etymonline.com/word/concrete .
Obviously these are three variations of same word, but with three completely different 'Indo-European' etymologies established, and, of course, 'unrelated' to any non-'I.E.' tongues.
Compare to Schanze (Ger.) - a military earthen rampart (as, e.g., in name Nyen, Nyenschantz - a fortress with many centuries of history, located at the cape where Ohta river flows into the Neva, destroyed by Peter I in 1703; nien being nīn (Livonian) - a fortress; nina (Est.), nanā (Livon.), nenä (Votic, Fin., Izhor., Karel.), ńeńä (Chudi), ńena (Veps.), njunni (Saami) - a nose, tip, end, cape).
Compare also with the geographical names of stretching peninsulas:
Hanko, Hankoniemi, Hangö udd, Га́нгут, Ха́нко - the Suomi most South-Western point;
Cancun - the Mexican most Eastern point at the peninsula of Yucatan - which so far the scholars only translate as the 'nest of snakes' or the 'thone of Snake': https://en.wikipedia.org/wiki/Canc%C3%BAn .
кон [kon] (Church Slavic) - a beginning;
конец [konets] (Rus., Bulg.), кiнець [kinets] (Ukr.), конац [konac] (Serbo-Croatian), konǝc (Sloven.), kоniес (Slovak, Pol.), коньць [kon'ts'] (Church Slavic) - an end.
küünis, küüs, gen. küüne, part. küün (Est.), kīņtš (Livon.), kynsi (Fin.), tšüüsi (Votic), küns (Izhora), künzi (Karel.), küńďž́ (Ludic.), künź (Veps.), kŏš (Khanty), kwons (Mansi), koza (Enets) - a claw, nail, tooth;
kenže (Erzia), keńžä (Moksha), küč́ (Mari), giži̮ (Udmurt), gi̮ž (Komi), гыж [gyzh] (Ingush language in Caucasus), gazza (Saami) - a claw, nail, tooth; hoof;
family names Kinch, Kinchev, Кинч, Кинчев; McKinsey (son of Kinsey) - for the latter, the British etymologysts have deduced an awkward hypothetical connection with the Celtic cyne 'royal' + sige 'victory';
kinžа (Karel.), кинжа [kinzha] (Rus. Olonets and Arkhangelsk dialects), кийнжа [kiynzha] (Ingush) - a nail or wedge for fixing an ax;
кинжал [kinzhal] (Rus.), χandžar, хаnǯär, kandžar, χindžal, χandžāl, хаndžаli (Azeri, Crimean Tatarian, Tatarian, Karach., Kalmyk., Georgian, etc.) - a dagger, a hooked knife;
Compare to Islamic name Sanjar (with a meaning of 'the attacking', 'the penetrating', 'the sharp');
sangar, gen. sangari, part. sangarit (Est.), sankari (Fin.) — the hero, the warrior; [Spoiler (click to open)]N.B. The Estonian linguists confuse the traces, and write that the Est. sangar is a 'borrowing' from Finnish: http://eki.ee/dict/ety/index.cgi?Q=sangar&F=M&C06=et ; and the Finnish scholars (effectively, the Swedish scholars in Finland) state that the Finnish sankari is a 'borrowing' from ... the Swedish sanger — 'singer': https://en.wiktionary.org/wiki/sankari .
The singers, the bards (lauljad), of course, were the respected persons, yet. they only sang about the heroes - for example, about Ulysses (Fin., Est. uljas, ulja, uljaspäine - 'the daring, dashing, gallant, brave, valiant, heroic, courageous, fearless, confident'; Est. uljas meremees - 'the daring sailor') and his uljas mereretk - 'the daring sea voyage':
cancel (Eng.), cancellare (Ital.) - to delete, cross out, destroy;
[Spoiler (click to open)]cancello (Ital.) - gate, exit;
cancellus (late Latin) - latice, barrier in church and court (derivating from cancellare and cancello, and not vice versa); further derivation: cancellarius (late Latin) - secretary in church, court, sitting after the barrier; and in France, Britain and Germany - chancelier, cancelor, chancellor, Kanzler - are the secretaries of state, the keepers of royal seal.
kengyel (Hung.) - stirrup of a horse rider;
kengü (Karel.) - shoe, shoes, horseshoe;
king, gen. kinga (Est.), kǟnga (Livon.), kenkä (Fin.), kengä (Izhora, Chudi), kenǵ (Vepsian) - boot, shoe, shoes;
känga, pl. kängor (Sw.) - boot, boots;
конёк, pl. коньки [koniok, pl. kon'ki] (Rus.) - shoes for skating on the ice.
[huna] הונע (Hebrew) – to be movable; Compare to: Huns ('the nomads', apparently literally);
κινώ, κινούμαι [kinó, kinoúmai] (Gr.) - to move, move oneself (connected: кино, cinema);
kone (Fin.) - any machine, any moving mechanism;
kõnna, kõndi(ma), konda(ma) (Est.), kontata (Fin., Karel.), kontia (Izhor.) - to walk, to go, to wander; kõnni! (Est.) - go! walk! kõnd, kõnni (Est.) - going, walking; kõnnumaa (Est.) - far away unknown lands;
конь [kon'] (Rus.) - a horse;
гон, гонять, гнать, гнаться, канать [gon, goniat', gnat', gnatsia, kanat'] (Rus.) - a go, to go, to walk;
[(n)ga-, (n)gen-] (Sumer.) - to go, to move;
go, gone (Eng.);
begin, began, begone (Eng.), beginnen, begonnen (Ger.).
kand, gen. kanna, part. kanda (Est.), kūonda (Livon.), kanta (Fin., Votic), kanda (Karel., Izhora), kand (Chudi, Veps.), χɔnt (Khanty), χānta (Mansi) – a bone, a limb, a back of the calcaneus, aleg, a foot, a heel;
χada (Nenets.), kәtu (Nganasan.) - nail, claw, tooth;
k͔atә (секульп.), kåda (камас.), kada (матор.) - nail, claw, tooth; hoof;
кентус [kentus] (Rus.) - knuckles of the middle and index fingers (the word is used exclusively among those who knock something with fingers);
hand (Eng.), Hand (Ger.) - per British scholars, a word 'of uncertain origin': http://www.etymonline.com/index.php?term=hand .
kindel, kindla, kandev (Est.), tšiintiä (Votic), kiinteä (Fin.), kiintiä (Izhor.), kiińďei (Karel.), kińďed (Chudi), giddat, giddes (Saami) - firm, strong, resistant, steady; dense; reliable, safe, faithful;
kinni(s) (Est.) - motionless, fixed; kinnis jää - string ice; kinnis tõrv - fixed tar;
[kin, gin] (Sumerian) - a stone; [gin + diri] (Sumerian) - 'stoned tears'; Comp. gintaras (Lith.), jentar (Slavic) - amber;
[qandi] (Arab.), qand (Pers.), қант [khant] (Kazakh) - sugar; from which there are such derivatives as 甘[Gān] (Chin.) - sweet; candy (Eng.) - a sweetie; connected to at least the verb [kattu] (Tamil) - "to harden, condense": http://www.etymonline.com/index.php?term=candy ;
кынты(ны) [kynty(ny)] (Udmurt) - to freeze; кынмы(ны) [kynmy(ny)] (Udmurt) - to get frozen; кынмен [kynmen] (Udmurt) - frozen; кынмон [kynmon] (Udmurt) - freezing (e.g., шуркынмон [shur kynmon] - november, literally, 'rivers freezing');
кыӈдь [kyngd'] (Nivkh language in Sakhalin) - to freeze;
къандал [khandal] (Ingush language in Caucasus) - icicle;
candela (Latin) - candle - which resembles the icicle per I.E. etymologists, derives from Latin verb candere - to shine, and in no case vice versa: https://www.etymonline.com/word/candle .
Ending -aroo in kangaroo is very similar to -eri, -ur, -ru (Est.), -uri (Fin.) - a participle suffix which forms "a subject of action in present" - similarly to -ar (Eng.), -арь [ar'] (Rus.), -are (Sw.). Comparable alsto to Turkic er - man.
Alternatively: kand-karu, kang-karu - where karu, karus (Est.), kahr, karh (Southern Est.), karhu (Fin., Izhor.), kar(a)hu (Karel.) - a bear, a furbearer, a fur animal.
So who would further wonder about the connection of KIVI (pan-Finno-Ugric) - a stone (as well as man's ball) - and KIWI - the hairy stone and ball- like fruit (and also a similarly looking non-flying bird) in New Zealand?