ざんこく残酷zankoku
1.

Characterized by a complete lack of compassion, often involving the infliction of suffering on others without remorse or justification.

2.

Describing actions or situations that are extremely harsh and devoid of kindness, leading to significant distress for people or animals.

3.

Referring to a disposition or behavior that is cold and unforgiving, readily causing pain to others in a manner that shows no emotional concern.

4.

Depicting acts that exhibit a severe and cruel nature, often leaving a devastating impact on those affected.

Example:

怪物は残酷な微笑みを浮かべた。

ざんこくひどう残酷非道zankokuhidou
1.

A description of behavior or actions that are exceptionally cruel, demonstrating a lack of compassion or kindness toward others.

2.

The quality of being shockingly harsh, often involving violent or brutal acts that provoke horror or revulsion.

3.

Conduct that embodies extreme moral depravity, often associated with severe suffering inflicted on individuals or groups without remorse.

4.

A state or condition marked by a pervasive absence of humanity, characterized by actions that are deemed heartless and barbaric.