Proto-IE: *egh-
Meaning: worm, snake
Armenian: iž `snake' (<*ēghi-)
Old Greek: ékhi-s m.(/f). `Viper; Otter', ékhidna f. `id.'
Celtic: *egi- > Cymr euod `lumbrici lati in hepate ovium', euon `Pferdewürmer'
Russ. meaning: жаба (червь, змея)
References: WP I 63 f