spirit

\ \ [13] Latin spīritus originally meant ‘breath’: it was derived from the verb spīrāre ‘breathe’ (source of English aspire [15], conspire [14], expire [15], inspire [14], perspire [17], respire [14], transpire [16], etc), which probably came ultimately from the prehistoric Indo-European base *speis- or *peis-, imitative of the sound of blowing or breathing out (source also of Old Church Slavonic piskati ‘whistle’, Serbo-Croat pistati ‘hiss’, and Old Norse físa ‘fart’). But in the Augustan period it gradually began to take over as the word for ‘soul’ from anima (source of English animal, animate, etc), which itself originally denoted ‘breath’, and in Christian Latin writings it was the standard term used.

\ \ Cf.⇒ ASPIRE, CONSPIRE, EXPIRE, INSPIRE, PERSPIRE, RESPIRE, TRANSPIRE