Solution

RIGOROUS

3 clues

Demanding

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

Other solutions to Demanding

Strict

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

Other solutions to Strict

Thorough

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

Other solutions to Thorough

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