n.: bark [bay] at the moon [bay the moon], futile, fruitless labor, futile effort, draw water in [with] a sieve(=pour water into a sieve)., the stone of Sisyphus, draw water with a sieve (=pour water into a sieve), all for nought, lost labour, an issueless effort, beat the wind, beat the air, in vain, ungratefulness, mockery
French Expression
n. vains efforts, peine perdue
Thesaurus
nowhere, frustration, none Echo, with no reward or result