adj. 25B6; adjective SYCOPHANTIC, toadying, fawning, unctuous, obsequious; flattering, insincere; smooth-tongued, silver-tongued, slick; greasy, oily, saccharine; informal smarmy, slimy, creepy, sucky.
INGRATIATING
Meaning of INGRATIATING in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012