Meaning of “suffer” - Learner’s Dictionary

suffer

verb uk us /ˈsʌfər/
PAIN [ I, T ]

B2 to experience pain or unpleasant emotions:

I can't bear to see animals suffering.
suffer from sth

B1 to have an illness or other health problem:

She suffers from severe depression.
suffer a broken leg/a heart attack, etc

B2 to experience an injury or other sudden health problem:

He suffered a serious neck injury in the accident.
suffer damage/defeat/loss, etc

B2 to experience something bad such as damage/defeat/loss, etc

BECOME WORSE [ I ]

to become worse in quality:

If you're tired all the time, your work tends to suffer.

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