οὐαί

Etymology
Traditionally compared with the set 🇨🇬, 🇨🇬, etc., from, but it is not derivable from there through regular sound laws. Beekes argues for a loanword; compare e.g. 🇨🇬. Cognacy with 🇨🇬 through is likewise not without phonological problems. Ultimately.

Interjection

 * 1)  ah, woe, alas