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Spirit from WikiPedia:

The English word "spirit" has many differing meanings and connotations, but commonly refers to a supernatural being or essence — transcendent and therefore metaphysical in its nature: the Concise Oxford Dictionary defines it as "the non-physical part of a person". For many people, however, spirit, like soul, forms a natural part of a being: such people may identify spirit with mind, or with consciousness, or with the brain.

The English word "spirit" comes from the Latin spiritus, meaning "breath" (compare spiritus asper), but also "soul, courage, vigor", ultimately from a PIE root *(s)peis- (to blow). In the Vulgate, the Latin word is the equivalent for Greek ?????? (pneuma) and the Hebrew ??? (ruah), as opposed to Latin anima and Greek psykh?. The word apparently came into Middle English via Old French. The distinction between soul and spirit developed in Judeo-Christian terminology (thus we find Greek psykhe as opposed to pneuma, Latin anima as opposed to spiritus, Hebrew ruach as opposed to neshama or nephesh; in Hebrew neshama comes from the root NShM or "breath").

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