Solution

HARDY

3 clues

Robust

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

Other solutions to Robust

Sturdy

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

Other solutions to Sturdy

Tough

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

Other solutions to Tough

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