Ielts vocabulary Masterclass book + ielts listening & Reading Dictionary: Dominate Proficiency Level Vocabulary for ielts listening, Reading, Writing & Speaking

Obsequious: MEANING: Servile, fawning
SENTENCE: The famous singer had an entourage of friends and staff,
many of whom were obsequious.
Obviate: MEANING: Eliminate a need or difficulty
SENTENCE: To obviate an ant infestation we clean our kitchen regularly.
Occlude: MEANING: Close up, or obstruct (an opening)

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SENTENCE: Foundation make-up occludes the pores of our skin.
Officious : MEANING: Excessively eager in giving unwanted advice,
interfering
SENTENCE: My colleague can be officious in telling me how to do my
job. It is annoying!
Omniscience: MEANING: All-knowing; having infinite knowledge
SENTENCE: Nobody except God can claim to have omniscience.
Onerous: MEANING: Involving a great deal of effort, trouble, or
difficulty
SENTENCE: He found his duties increasingly onerous.
Opprobrium: MEANING: A state of extreme dishonour
SENTENCE: He threw a can of drink off the balcony, and earnt
opprobrium.