intransitive verb see: plaint Date: 14th century to express grief, pain, or discontent , to make a formal accusation or charge, ~er noun ~ingly adverb
COMPLAIN
Meaning of COMPLAIN in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012