English Reference
adjective

ruthless

adj.
US /ˈɹuθɫəs/ UK /ɹˈuːθləs/ ruth·less

  1. 01 B2 Upper Intermediate

    having no pity or sympathy for others; being very cruel to get what you want.

    devoid of pity, compassion, or mercy; exhibiting a cold-hearted willingness to cause suffering.

    Simple

    The ruthless dictator stayed in power by punishing anyone who disagreed with him.

    In context

    The regime was known for its ruthless suppression of dissent, often using extreme measures to silence even the mildest critics.

    Usage

    Often used to describe leaders, criminals, or specific acts of violence.

    cruelpitilessheartless
  2. 02 B2 Upper Intermediate

    doing whatever is necessary to succeed, even if it seems harsh or unfair.

    characterised by an unrelenting and uncompromising determination to achieve an objective, regardless of the cost to others.

    Simple

    She is a ruthless businesswoman who will do anything to beat her competitors.

    In context

    In the ruthless world of high finance, traders often prioritise short-term gains over ethical considerations or long-term stability.

    Usage

    Commonly used in business, sports, and politics to describe intense competition.

Sometimes you have to take tough decisions." It is a ruthless outcome for the Spain international, who was backed publicly by Alonso and privately by senior figures at the club before they changed course.

BBC News· 30 Aug 2026

He went on to become a celebrated—some would say ruthless —“ Indian fighter ” in the American West, as well as a best-selling author and magazine writer .

Smithsonian Magazine· 24 Jun 2026

From Middle English reuþeles; equivalent to ruth + -less.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Middle English reuþeles
Level B2 · Upper Intermediate
Frequency Frequent
Updated