Noun

(en noun)

A grievance, problem, difficulty, or concern; the act of complaining.

I have no complaints about the quality of his work, but I don't enjoy his company.

(legal) In a civil action, the first pleading of the plaintiff setting out the facts on which the claim is based;
The purpose is to give notice to the adversary of the nature and basis of the claim asserted.

(legal) In criminal law, the preliminary charge or accusation made by one person against another to the appropriate court or officer, usually a magistrate.
However, court proceedings, such as a trial, cannot be instituted until an indictment or information has been handed down against the defendant.

A consumer complaint.

A bodily disorder or disease; the symptom of such a disorder.

Don't come too close, I've got this nasty complaint .

Noun

(wikipedia escalation) (en noun)

an increase or rise, especially one to counteract a perceived discrepancy

*{{quote-news

, year=2012 , date=April 19 , author=Josh Halliday , title=Free speech haven or lawless cesspool – can the internet be civilised? , work=the Guardian citation , page= , passage=Thousands of violent videos are still available on the internet, according to Alexander, who claims they lead to an escalation in offline tensions between rival gangs. "I believe some young people are losing their lives as result of this material on the internet," she said.}}

a deliberate or premeditated increase in the violence or geographic scope of a conflict