给出以下十个单词的定义：abate、banal、capricious、deleterious、egregious、fervid、gregarious、hackneyed、impassive、jocular。
abate: to become smaller or less intense; banal: lacking originality or freshness; capricious: given to sudden changes of mood or behavior; deleterious: harmful or damaging; egregious: outstandingly bad or shocking; fervid: intensely enthusiastic or passionate; gregarious: fond of company, sociable; hackneyed: lacking originality, overused; impassive: not showing emotion; jocular: humorous or playful.