Godan verb with 'ru' ending, Intransitive verbto boil; to seethe · to roil (e.g. waterfall, torrent); to foam; to cascade down · to well up (of emotions); to overflow (e.g. fighting spirit); to seethe (esp. blood)

Godan verb with 'su' ending, Transitive verbto boil; to bring to a boil

Ichidan verb, Transitive verbto bring to a boil; to make seethe · to stir up (emotions); to fire up; to make surge

Godan verb with 'ru' ending, Intransitive verbto boil; to be boiling hot; to be on a rolling boil

Godan verb with 'ru' ending, Intransitive verbto be ardent (of passion, zeal, etc.); to be aflame