Meaning of the word "well nigh" in English

What does "well nigh" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

well nigh

US /ˌwel ˈnaɪ/
UK /ˌwel ˈnaɪ/

Adverb

almost; very nearly

Example:
The task was well nigh impossible.
He was well nigh exhausted after the long journey.