unctuous
adjective /ˈʌŋktʃuəs/
/ˈʌŋktʃuəs/
(formal, disapproving)- friendly or giving praise in a way that is not sincere and that is therefore unpleasant
- an unctuous host
Word Originlate Middle English (in the sense ‘greasy’): from medieval Latin unctuosus, from Latin unctus ‘anointing’, from unguere ‘anoint’.