English

Definition of unctuous adjective from the Oxford Advanced Learner's Dictionary

 

unctuous

 adjective
adjective
BrE BrE//ˈʌŋktjuəs//
 
; NAmE NAmE//ˈʌŋktʃuəs//
 
(formal, disapproving)
 
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friendly or giving praise in a way that is not sincere and which is therefore unpleasant an unctuous host Word Origin late Middle English (in the sense ‘greasy’): from medieval Latin unctuosus, from Latin unctus ‘anointing’, from unguere ‘anoint’.
See the Oxford Advanced American Dictionary entry: unctuous