aiw- / Indo-European roots
Examples of words with the root aiw-: age, aught, aye, Ayurveda, coetaneous, coeval, echt, eon, eternal, ever, every, hygiene, longevity, medieval, nay, never, no, primeval, sempiternal, utopia.
Vital force, life, long life, eternity; also "endowed with the acme of vital force, young"Oldest forms *h2eiw-, *h2eyu-, colored to *h2aiw-, *h2ayu-.
▲ Derivatives include no1, ever, medieval, age, eon.
a. no1 from Old English ā, ever;
b. aught1 from Old English āwiht, āuht, anything, "ever a creature";
c. ever; every, never from Old English ǣfre (second element obscure), ever;
d. aye2; nay from Old Norse ei, ever. a, c, and d all from extended Germanic form *aiwi; b from Germanic *aiwi + *wihti, "ever a thing, anything" (*wihti-, thing; see wekti-).
2. Suffixed form *aiw-ā-. echt from Middle Low German echte, true, legitimate, akin to Old High German ēohaft, according to custom, from ēwa, custom, right (< "what is eternal, what endures") + -haft, having (a characteristic) (see kap-)
a. Suffixed form *aiw-o-. coeval, longevity, medieval, primeval from Latin aevum, age, eternity;
b. further suffixed form *aiwo-tā(ti)-. age; coetaneous from Latin aetās (stem aetāti-), age;
c. further suffixed form *aiwo-t-erno-. eternal, eterne, eternity; sempiternal from Latin aeternus, eternal.
4. Suffixed form *aiw-en-. eon from Greek aiōn, age, vital force.
5. Zero-grade form *yu- (earlier *h2yu-) in compound *h2yu-gwih3-es-, "having a vigorous life" (*gwih3-es-, life; see gwei-) hygiene from Greek hugiēs, healthy.
6. O-grade form *oyu- (earlier *h2oyu-).
a. utopia from Greek ou, not, variant of ouk, probably from a pre-Greek phrase *(ne) oyu (kwid), "(not on your) life" (ne, not, and *kwid, finite pronoun used as emphasizing particle; see ne, kwo-);
b. Ayurveda from Sanskrit āyuḥ, life, health, from suffixed form *oyu-s-.
[Pokorny aiu̯- 17.]