complementizer

[ kom-pluh-muh n-tahy-zer ]
/ ˈkɒm plə mənˌtaɪ zər /

noun Linguistics.

an element or elements marking a complement clause, as that in We thought that you forgot, for … to in For you to go all the way there would be silly, or possessive …-ing in Barbara's leaving so early worried them.

Origin of complementizer

British Dictionary definitions for complementizer

complementizer
/ (ˈkɒmplɪmənˌtaɪzə) /

noun

generative grammar a word or morpheme that serves to introduce a complement clause or a reduced form of such a clause, as that in I wish that he would leave