JMdict: 1632610

べし 【べし】

1. [aux] must; should; ought to
2. [aux] will (surely); be bound to; must
3. [aux] will (do); shall

Words often seen with this one: (experimental feature)

こと (21), 者 (19), という (15), なる (13), 人 (13), ける (12), 死 (12), その (12), 眠り (12), そんな (11), いい (10), ぐる (10)