Nounopen seam; seam that has come apart; tear

Godan verb with 'bu' ending, Intransitive verbto begin to open; to come out · to smile broadly · to come apart at the seams (clothes)

Godan verb with 'su' ending, Transitive verbto rip up (a seam); to burst; to tear; to break out (e.g. into a smile)

Ichidan verb, Transitive verbto break into a smile · to tear open; to tear apart · to open; to begin to open