Unquenchable

His unquenchable ambition drove him to start his own successful business at a young age.

The explorer's unquenchable spirit of adventure led her to embark on daring expeditions to remote places.

The patient's unquenchable hope for a cure motivated him to try every available treatment option.

Despite facing numerous setbacks, her unquenchable optimism allowed her to persevere and achieve her goals.

The passion for music in his heart was unquenchable.

The child's curiosity seemed unquenchable as he asked one question after another.