a Gordian knot

(formal)

a difficult problem

Usage notes: In an old story, King Gordius of Phrygia tied a complicated knot which no one could make loose, until Alexander the Great cut it with his sword.

Homelessness in the inner cities has become a real Gordian knot.

Common Names:

Name	Pronounced	Usage
Sigmund	ZEEK-muwnt (German), SIG-mənd (English)	German, Swedish, Norwegian, Danish, English
Marcell	-	Hungarian, German
Kadri	KAHD-rree	Estonian
SafİYe	-	Turkish
Luule	-	Estonian
Susan	['su:zn]