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complain

v.
US //kəmˈpɫeɪn// UK //kəmplˈeɪn// com·plain
  1. 1 to express dissatisfaction (v.)
    A2 Elementary

    to say that you are not happy with a situation or that something is wrong.

    to express feelings of resentment, pain, or dissatisfaction regarding a situation or person.

    Example

    The neighbors complained about the loud music coming from our apartment last night.

    Example

    Several passengers complained about the lack of communication from the airline during the four-hour delay at the terminal.

    Usage

    Often followed by the prepositions 'about' or 'that'.

    Pitfall
    She complained for the cold weather.
    She complained about the cold weather.

    Use 'about' or 'of' to describe the subject of a complaint, not 'for'.

  2. 2 to report a medical symptom (v.)
    B1 Intermediate Medicine

    to tell a doctor or someone else that you feel pain or are sick.

    to report a physical ailment or symptom of illness.

    Example

    He went to the doctor because he was complaining of chest pains.

    Example

    The patient complained of persistent migraines and blurred vision, prompting the neurologist to order a series of diagnostic scans.

    Usage

    Commonly used with 'of' followed by the specific symptom.

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  1. 3 to make a formal charge (v.)
    B2 Upper Intermediate Formal Law

    to make a formal statement to the police or an official about a crime or bad behavior.

    to lodge a formal accusation or legal charge against a party.

    Example

    The company decided to complain to the regulator about the unfair competition.

    Example

    The victim chose to complain to the authorities after discovering that the contractor had systematically overcharged for the repairs.

    Usage

    Often used in legal or administrative contexts.

  2. 4 to creak under pressure (v.)
    C2 Proficiency Literary

    to make a high noise because of heavy weight or pressure, like an old floor or a ship.

    to emit a characteristic creaking or groaning sound when subjected to physical stress or pressure.

    Example

    The old wooden stairs complained as I walked up them in the middle of the night.

    Example

    The ship's timbers complained loudly as the vessel pitched against the violent waves of the North Atlantic.

Origin

From Middle English complaynen, from Old French complaindre, from Medieval Latin complangere (“to bewail, complain”), from Latin com- (“together”) + plangere (“to strike, beat, as the breast in extreme grief, bewail”); see plain, plaint.

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