grovel

Synonyms: apple-polish beg beg for mercy beseech blandish bootlick bow and scrape brown-nose butter up cater to court cower crawl creep cringe crouch eat crow eat dirt eat humble pie fall all over fawn flatter humble oneself humor implore kiss one’s feet kneel kowtow make much of make up to pamper play up to prostrate revere snivel softsoap stoop suck up to truckle wheedle yes

Antonyms: boast