bang one's head against a brick wall

動詞

慣用表現自動詞

(intransitive, idiomatic) To waste effort on a futile project.

日本語の意味

無駄な努力をする / 徒労に終わる試みをする / 意味のない試みに力を注ぐ

One shouldn't bang one's head against a brick wall when the task is hopeless.

その仕事が絶望的なら、無駄な努力をするべきではない。

意味（1）

(intransitive, idiomatic) To waste effort on a futile project.

bangs one's head against a brick wall

（ present singular third-person ）

banging one's head against a brick wall

（ participle present ）

banged one's head against a brick wall

（ participle past ）

banged one's head against a brick wall

（ past ）