κήξ

Etymology
Has been compared with bird names like 🇨🇬 and other Celtic words, whence 🇨🇬. Within Greek, one also finds forms with internal velar, like, with which are compared 🇨🇬 and primary verbs like 🇨🇬 and 🇨🇬. However, according to Beekes, the word is, in view of the suffix.

Noun

 * 1) sea swallow, tern