φάση

Greek

Learnedly from Ancient Greek φᾰ́σῐς (phásis, “appearance”), with semantic loan from English phase for the non-astronomical senses.^[1]

φάση • (fási) f (plural φάσεις)

phase, stage (a distinguishable part of a sequence or cycle occurring over time)
(sports) phase (period of play)
(electrical engineering) phase
(physics, mechanics) phase
(chemistry) phase
(astronomy) phase
οι φάσεις της Σελήνης ― oi fáseis tis Selínis ― the phases of the Moon

Declension of φάση

	singular	plural
nominative	φάση •	φάσεις •
genitive	φάσης •	φάσεων •
accusative	φάση •	φάσεις •
vocative	φάση •	φάσεις •
Also, older or formal genitive singlar: φάσεως •

^ φάση, in Λεξικό της κοινής νεοελληνικής [Dictionary of Standard Modern Greek], Triantafyllidis Foundation, 1998 at the Centre for the Greek language