preformationism

plural of preformative

Chiefly in Semitic languages: a formative letter, syllable, etc., at the beginning of a word.

Of or pertaining to preformation. / Of a thing: forming or affecting something that comes later.

plural of preformant

(archaic, rare) Chiefly in Semitic languages: Synonym of preformative (“a formative letter, syllable, etc., at the beginning of a word”)