Tolerate, endure (4)
I believe the answer is:
bear
This clue is a double definition.
'tolerate' is the first definition.
(synonyms)
'endure' is the second definition.
(synonyms)
(Other definitions for bear that I've seen before include "Carry; large mammal" , "stand" , "Show" , "Carry; brutish person" , "Give birth to; animal" .)