in ‧ ure /ɪˈnjʊə $ ɪˈnjʊr/ BrE AmE verb
[ Date: 1400-1500 ; Origin: ure 'usual practice' (15-18 centuries) , from Old French uevre 'work, practice' , from Latin opera 'works' ]
inure somebody to something phrasal verb [usually passive]
to make someone become used to something unpleasant, so that they are no longer upset by it:
Nurses soon become inured to the sight of suffering.