frivol Antonyms

do approach astutely on approach competently on approach deftly on busy oneself with carry out capably on carry out efficiently on carry out professionally on deal resourcefully on devote oneself to endeavor diligently on apply wittily on apply shrewdly on apply oneself to concentrate on deal with do your best address oneself to apply ably on apply dexterously on apply knowledgeably on apply oneself diligently on apply oneself energetically on apply oneself hard on endeavor earnestly on