sulkinesssulkiness means the state or quality of being sulky. Lexicurio rates it Rare gem — a strength score of 78 out of 100.EtymologyFrom sulky + -ness. Compare Middle English solcenesse, asolkenesse, Old English āsolcennes.nounThe state or quality of being sulky.The result or product of being sulky.Down the rabbit holeEvery word is a door. Follow one.Often followed bywhichwhenoccasionallyaboutOften preceded bylittlesilentdignifiedconcentratedNear rhymesbeneficemimesisduskinessmugginesspluckinesslovelinesscomelinessfuzzinessstuffinessbloody fluxfussinesstouchinessmustinessbloodinesslustinesssubgenussubsequencepuffiness