IPA: /oʊˈliːədʒɪnəs/
KK: /oʊˈliːədʒɪnəs/
Having a greasy or oily quality, often used to describe someone who is excessively flattering or ingratiating in a way that feels insincere.
His oleaginous compliments made everyone uncomfortable at the meeting.
Oleaginous → It is formed from "oleagin-" (from Latin "oleaginus", meaning oily or greasy) and "-ous" (meaning full of). The word describes something that is full of oil or has an oily quality.
Think of 'oily' ('oleagin-') to remember that 'oleaginous' means something that is full of oil or greasy.