Russe ⇄ Allemand Anglais Espagnol Italien Polonais Portugais +

добиваться невозможного contraintes
génér.	run one's head against a brick wall; bash one's head against a tree; run one's head against a wall; square the circle; reach for the sky (Taras)
Gruzovik, inform.	strive for the impossible
makar.	square a circle; run one's head against a brick wall
math.	attempt the impossible