complementizer
com ple men tiz er |ˈkämpləˌmenˌtīzər, -mən -ˈkɑmpləmənˌtaɪzər | ▶noun Grammar a word or morpheme that marks an embedded clause as functioning as a complement, typically a subordinating conjunction or infinitival to .
complementizer |ˈkɒmplɪməntʌɪzə (r ) |(also complementiser ) ▶noun Grammar a word or morpheme that marks an embedded clause as functioning as a complement, typically a subordinating conjunction or infinitival to .