Solution

UNBEARABLY

3 clues

Excessively

Word class: Adverb
Nature of clue: Description
Difficulty: Medium
Sources: Boatload Puzzles

Other solutions to Excessively

Extremely

Word class: Adverb
Nature of clue: Synonym
Difficulty: Easy
Sources: Boatload Puzzles

Other solutions to Extremely

Intolerably

Word class: Adverb
Nature of clue: Synonym
Difficulty: Medium
Sources: Boatload Puzzles

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