prothesis (n.)

a Greek word used in various senses in English; from Greek prothesis "a putting, a placing before, a placing in public," from pro "before" (see pro-) + thesis "a placing" (from reduplicated form of PIE root *dhe- "to set, put"). In the ecclesiastical sense ("preparation of the eucharistic elements before the liturgy in the Greek Church") from 1670s; grammatical sense ("addition of one or more sounds or letters at the beginning of a word") is by 1870. Related: Prothetic (1835 in grammar); prothetical; prothetically.

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