bang (someone's) head against (a) brick wall

Translations
биться головой об стену
Trying to convince him to change his mind is like banging your head against a brick wall.
Пытаться убедить его изменить своё мнение - всё равно что биться головой об стену.
Definitions
To repeatedly try to achieve something that is very difficult or impossible, often becoming frustrated because no progress is being made.
Words
head

noun
голова
wall

noun
стена
bang

verb
ударить