transient
From LSJ
ὕπνος δεινὸν ἀνθρώποις κακόν → sleep is a terrible evil for humans (Menander, Sententiae monostichoi 1.523)
lasting a short time: P. ὀλιγοχρόνιος (Plato).
soon passing: P. and V. πτηνός (Plato).
momentary: P. and V. ὁ αὐτίκα, ὁ παραυτίκα.
