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adjective
B2 · Upper Intermediate (estimated)
More precise, slightly abstract vocabulary used in educated everyday English.
Pronunciation
Simple meaning
Yielding good or useful results.
Definition
Yielding good or useful results.
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selfish
adjective · C1
Having excessive or exclusive regard and concern for one's own feeling good, profit or pleasure.
mechanism
noun · B1
Any mechanical means for the conversion or control of motion, or the transmission or control of power.
vanish
verb · C1
To become invisible or to move out of view unnoticed.
insure
verb · B2
To provide for compensation if some specified risk occurs.
grudge
noun · C2
Deep-seated and/or long-term animosity or ill will about something or someone.
reinforcement
noun · C1
The process whereby a behavior with desirable consequences comes to be repeated.
