Hey you! Yes, you! Thank you for adding beauty to the world!
Definitions of prothesis:
noun: (phonology) The prepending of phonemes at the beginning of a word without changing its morphological structure, as in Spanish esfera from Latin sphaera (“sphere”) (without prothesis the word would have become *sfera).
noun: (Christianity) The preparation and preliminary oblation of the Eucharistic bread and wine in the Divine Liturgy of the Eastern Orthodx and Eastern Catholic Churches.