Meaning of the word "come hell or high water" in English

What does "come hell or high water" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

come hell or high water

US /kʌm hɛl ɔr haɪ ˈwɔtər/
UK /kʌm hɛl ɔː haɪ ˈwɔːtər/
"come hell or high water" picture

Idiom

no matter what difficulties arise; despite any obstacles

Example:
I'll finish this project by Friday, come hell or high water.
She promised to be there for me, come hell or high water.