English grum

← Old English grom (inherited)

← Old English gram (mention)

← Danish grum (cognate)

← English grim (mention)

← English gram (mention)

← English grump (mention)

← Middle English grom (inherited)

← Proto-Germanic *gramaz (inherited)

← Proto-Indo-European *gʰrem- (derived)

← Swedish grym (cognate)

→ English grump (mention)