D defs.my
Entry 1 sense Webster, 1913

Complainer

/(kŏm*plān"ẽr)/ · Com·plain·er · IPA /kəmˈpleɪnɚ/
01 n. One who complains or laments; one who finds fault; a murmurer.
  1. 1.
    One who complains or laments; one who finds fault; a murmurer.
    “Speechless complainer, I will learn thy thought.” Shak.