expletory

adjective

ex·​ple·​to·​ry ˈek-splə-ˌtȯr-ē 

: expletive

Word History

Etymology

borrowed from New Latin explētōrius "(of a word) filling up or completing," from Latin explēre "to fill up, satisfy, make good" + tōrius, deverbal adjective suffix originally forming derivatives from agent nouns ending in -tōr-, -tor — more at expletive entry 2

First Known Use

1672, in the meaning defined above