Solution

THWARTS

3 clues

Blocks

Word class: Verb
Nature of clue: Synonym
Difficulty: Very easy

Other solutions to Blocks

Foils

Word class: Verb
Nature of clue: Synonym
Difficulty: Easy

Prevents

Word class: Verb
Nature of clue: Synonym
Difficulty: Very easy

Other solutions to Prevents

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