רוסית ⇄ אנגלית

лбом стенку не прошибешь מתח
.פִּתג	used to mean: you'll never overcome that obstacle, it's too big for you you can't knock down a wall with a pea-shooter
лбом стенку не прошибёшь
כלל.	it's no use beating your head against a brick wall
.פִּתג	you can't break down walls by beating your head against them