ἐμύς

Etymology
. Sommer derives it from, because the animal, when breathing out below the surface of water, continuously releases air bubbles. However, Beekes states that -ud- is not an Indo-European suffix, concluding that the word is probably. The variation ἀ-/ἐ- is also proof of substrate origin.

Noun

 * 1) freshwater tortoise

Usage notes
This word is primarily feminine but sometimes masculine, as in: