Meaning of “exert” - Learner’s Dictionary

exert

verb uk us /ɪɡˈzɜːt/

[ T ] to use something such as authority, power, influence, etc in order to make something happen:

My parents exerted a lot of pressure on me to do well at school.
exert yourself

to use a lot of physical or mental energy to do something:

She was too sick to exert herself much.

(Definition of “exert” from the Cambridge Learner’s Dictionary © Cambridge University Press)