The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
Appendix I
Indo-European Roots
ENTRY:
awi-
DEFINITION:
Bird. Oldest form *2ewi-, colored to *2awi-. Derivatives include aviation, bustard, ostrich, cockney, oval, and caviar. I.1.avian, aviary, aviation; aviculture, avifauna, bustard, ocarina, osprey, ostrich, from Latin avis, bird. 2. Compound *awi-spek-, “observer of birds” (*spek-, to see; see spek-). auspice, from Latin auspex, augur. II. Possible derivatives are the Indo-European words for egg, *wyo-,*yyo-.1a.cockney, from Old English g, egg; b.egg1, from Old Norse egg, egg. Both a and b from Germanic *ajja(m).2.oval, ovary, ovate, ovi-, ovolo, ovule, ovum, from Latin vum, egg. 3. oo-, from Greek ion, egg. 4.caviar, from a source akin to Middle Persian khyak, egg, from Old Iranian *vyaka-, diminutive of *avya-. (Pokorny aei- 86.)
2ewi-, colored to *
wyo-, *
g, egg; b. egg1, from Old Norse egg, egg. Both a and b from Germanic *ajja(m). 2. oval, ovary, ovate, ovi-, ovolo, ovule, ovum, from Latin 
yak, egg, from Old Iranian *
ei- 86.) 
