Meaning of the word "a carper can cavil at anything" in English

What does "a carper can cavil at anything" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

a carper can cavil at anything

US /ə ˈkɑːrpər kæn ˈkævɪl æt ˈɛniˌθɪŋ/
UK /ə ˈkɑːpə kæn ˈkævɪl æt ˈɛniˌθɪŋ/
"a carper can cavil at anything" picture

Phrase

a person who habitually finds fault will find something to complain about even in the most trivial matters

Example:
I tried my best to please him, but a carper can cavil at anything.
Don't worry about her negative comments; a carper can cavil at anything.