ruthless

showing no pity or mercy; extremely cruel and violent

implacable, sin piedad, brutal

• [T + obj]
• [predicative]

Collocations ruthless attack · ruthless killer

• The army launched a ruthless attack on the rebel stronghold.

  El ejército lanzó un ataque implacable contra la fortaleza de los rebeldes.

determined to succeed, often by any means necessary; showing no pity or mercy towards others in order to achieve your goals

implacable, sin escrúpulos, tenaz

• [T + obj]
• [predicative]

Collocations ruthless ambition · ruthless competitor

• She was ruthless in her pursuit of power.

  Ella fue implacable en su búsqueda de poder.