abrogating

adverse gloomy pessimistic unfavorable weak

annulling anti con contrary contravening denying disallowing disavowing dissenting gainsaying impugning invalidating jaundiced naysaying neutralizing nullifying opposing recusant refusing rejecting removed resisting

against antagonistic balky colorless counteractive cynical detrimental dissentient nugatory privative repugnant resistive unaffirmative unenthusiastic uninterested unwilling

favorable

good positive