The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
Appendix I
Indo-European Roots
ENTRY:
w-
DEFINITION:
To blow. Contracted from *we1-; oldest basic form *2we1-.1. Suffixed shortened form *we-dhro-.weather, from Old English weder, weather, storm, wind, from Germanic *wedram wind, weather. 2. Suffixed (participial) form *w-nt-o-, blowing. a. (i)wind1, from Old English wind, wind; (ii)window, from Old Norse vindr, wind. Both (i) and (ii) from Germanic *windaz;b.vent1, ventail, ventilate, from Latin ventus, wind. 3.wing, from Middle English wenge, wing, from a Scandinavian source akin to Old Norse vængr, wing, from suffixed Germanic form *w-ingjaz.4. Basic form *w-.nirvana, from Sanskrit vti (stem *v-), it blows. (Pokorny 10. a(e)- 81.)
-
1-; oldest basic form *
ti (stem *v
(e)- 81.) 
