Third-person singular present simple form of complain(verb)
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Use "complaineth" in a sentence
"Then she strained the lute to her bosom, bending over it as mother bendeth over babe, and swept the strings which complained as child to mother complaineth; after which she played upon it and began improvisng these couplets,"
"Replied Obayd, No! But whenever I have by me a guest like thee, he complaineth in the morning of the mosquito bites, and this happeneth only when he is like thee beardless."
"Presently, one of her maids brought her a silken bag, which she opened and taking thereout a lute, laid it in her lap and smote its strings, whereat it complained as child complaineth to mother, and she sang these two couplets,"