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
complementizer in American English
(ˈkɑmpləmənˌtaizər)
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
Word origin
[complement + -ize + -er1]-er is a suffix used in forming nouns designating persons from the object of their occupationor labor (hatter; tiler; tinner; moonshiner), or from their place of origin or abode (Icelander; southerner; villager), or designating either persons or things from some special characteristic or circumstance(six-footer; three-master; teetotaler; fiver; tenner)