Russian ⇄ English Polish

безнадёжная затея stresses
gen.	fool's errand (SirReal)
безнадёжная затея People are agreeing with you-___-___ but not because you're right. They're just sick and tired of arguing with you. It's a losing proposition. Folks can't reason with someone who's not in reality ...
gen.	losing proposition (VLZ_58)

безнадёжная затея: 1 phrase in 1 subject

Informal

1