per ‧ spire /pəˈspaɪə $ pərˈspaɪr/ BrE AmE verb [intransitive] formal
[ Date: 1600-1700 ; Language: French ; Origin: perspirer , from Latin spirare 'to breathe' ]
if you perspire, parts of your body become wet, especially because you are hot or have been doing hard work SYN sweat :
Willie was perspiring heavily.