v.
Pronunciation: ' t ə -f ə n
Function: verb
Inflected Form: tough · ened ; tough · en · ing \ ' t ə -f ə -ni ŋ , ' t ə f-ni ŋ \
Date: 1582
transitive verb : to make tough
intransitive verb : to become tough
v.
Pronunciation: ' t ə -f ə n
Function: verb
Inflected Form: tough · ened ; tough · en · ing \ ' t ə -f ə -ni ŋ , ' t ə f-ni ŋ \
Date: 1582
transitive verb : to make tough
intransitive verb : to become tough
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012