黄昏る

also 黄昏れる

1. ichidan verb, intransitive to get dark after sunset; to turn to dusk; to fade into twilight
2. to decline (after a peak); to wane; to lose vigour
3. colloquial to be lost in thought; to be in a pensive mood; to look melancholic

たそがる

1. Nidan verb (lower class) with 'ru' ending (archaic), intransitive, archaic to get dark after sunset; to turn to dusk; to fade into twilight
2. archaic to decline (after a peak); to wane; to lose vigour