Modifies a noun

• blade: A halberd is a spear like weapon - a long shaft with a double-edged blade on the end.

• weapon: The enthusiasm with which so many Shia went to the polls is a double-edged weapon.

• nature: The double-edged nature of the alliance, especially with the US, can be seen in Churchill's approach.

• dagger: Top kris A Double-edged Malaysian dagger with blades ranging from 5 inches to 30 inches.

• knife: This is like a double-edged knife for a reviewer.