1》 construct a square equal in area to a given circle (a problem incapable of a purely geometrical solution).
2》 do something considered to be impossible.
→ square
1》 construct a square equal in area to a given circle (a problem incapable of a purely geometrical solution).
2》 do something considered to be impossible.
→ square
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004