toughen
verb
[ ˈtʌfn ]
• make or become stronger or more resilient.
• "he tried to toughen his son up by sending him to public school"
Similar:
strengthen,
fortify,
reinforce,
harden,
stiffen,
consolidate,
temper,
season,
rigidify,
thicken,
coarsen,
indurate,
anneal,
cement,
give strength to,
steel,
harshen,
make resilient,
make unfeeling,
brutalize,
make callous,
case-harden,
inure,
