Definition of tough verb from the Oxford Advanced American Dictionary

 

tough

 verb
verb
NAmE//tʌf//
 
Verb Forms present simple I / you / we / they tough
 
he / she / it toughs
 
past simple toughed
 
-ing form toughing
 
 
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Phrasal Verbstough somethingout
See the Oxford Advanced Learner's Dictionary entry: tough