to undergo or feel pain or distress

The patient is still suffering.

to sustain injury, disadvantage, or loss

One's health suffers from overwork. The business suffers from lack of capital.

to undergo a penalty, as of death

The traitor was made to suffer on the gallows.

to endure pain, disability, death, etc., patiently or willingly.

to undergo, be subjected to, or endure (pain, distress, injury, loss, or anything unpleasant)

to suffer the pangs of conscience.

to undergo or experience (any action, process, or condition)

to suffer change.

to tolerate or allow

I do not suffer fools gladly.