Solution

HARSH

3 clues

Abrasive

Word class: Common adjective
Nature of clue: Synonym
Difficulty: Easy

Severe

Word class: Common adjective
Nature of clue: Synonym
Difficulty: Very easy

Other solutions to Severe

Stern

Word class: Common adjective
Nature of clue: Synonym
Difficulty: Easy

Other solutions to Stern

UNFORGIVING

Words are categorized by artificial intelligence: there can be mistakes.