keener Antonyms

less virtuoso less expert less dextrous less dexterous less competent less rational less sensible more disagreeable less prepared less thoughtful less capable less enlightened less informed less trained less skillful less skilled less skilful less reasonable less qualified less proficient less practised less practiced less penetrating less artful less adept less accomplished less cunning less brilliant foolisher less prudent less knowing less judicious ignoranter poorer sillier lower less discerning less educated more thoughtless more injudicious more credulous less perspicacious less learned less knowledgeable less intelligent less insightful less ingenious less experienced duller