aóristos

From ἀ- (a-, “not”) +‎ ὁρῐστός (horĭstós, “limited”).

ᾰ̓όρῐστος • (ăhórĭstos) m or f (neuter ᾰ̓όρῐστον); second declension

indefinite, indeterminate
without boundaries, debatable
the phrase ὁ ἀόριστος (χρόνος (khrónos)) (ho aóristos (khrónos (khrónos))): the aorist tense