Com‐plain″ (?), v. i. [imp. & p. p.Complained (?); p. pr. & vb. n.Complaining.] [F. complaindre, LL. complangere; com- + L. plangere to strike, beat, to beat the breast or head as a sign of grief, to lament. See Plaint.] 1. To give utterance to expression of grief, pain, censure, regret. etc.; to lament; to murmur; to find fault; — commonly used with of. Also, to creak or squeak, as a timber or wheel.
O loss of sight, of thee I most complain!
Milton.
2. To make a formal accusation; to make a charge.
Now, Master Shallow, you'll complain of me to the king?
Shak.
Syn. — To repine; grumble; deplore; bewail; grieve; mourn; regret; murmur.