What this suffix does
-edged describes the edge or blade of something, literally or figuratively: double-edged (has both an upside and a risk), sharp-edged. "a double-edged sword" is a very common expression for something with pros and cons.

Suffix · forms adjectives
Describes the kind of edge something has, literal or figurative: double-edged (cuts both ways) and sharp-edged (sharp, cutting).
Written by Bryan López, English teacher · Updated
-edged describes the edge or blade of something, literally or figuratively: double-edged (has both an upside and a risk), sharp-edged. "a double-edged sword" is a very common expression for something with pros and cons.
Adjective + edged.
This is not a productive rule you can apply freely: it is a closed set of fixed expressions. Learn them one by one as set phrases.
-edged
Tap the button to hear how the ending sounds. Each word in the table has its own audio.
The figurative meaning of "double-edged" is now far more common than the literal one. A "double-edged sword" — the full idiom — refers to something that is both an advantage and a disadvantage at the same time. "That policy is a double-edged sword: it reduces crime but increases surveillance." This is one of the most used idioms in English political and economic commentary.
"Cutting-edge" (without -d) is the established compound for "at the forefront of innovation." You would say "cutting-edge technology," not "cutting-edged technology." The -edged form exists for other uses (sharp-edged, razor-edged) but the innovation compound is always "cutting-edge."
A trick to remember it
"Edge" = edge, literal. Picture a sword sharpened on BOTH sides: double-EDGED = cuts both ways, has both an upside and a risk.
Exercise 1 · Form the word
Exercise 2 · Pick the right one
"sharp-edged" describes something that is...
The suffix -edged describes the kind of edge something has, literal or figurative: double-edged (cuts both ways) and sharp-edged (sharp, cutting). In Spanish it usually maps to de filo / de borde.
"double" becomes "double-edged". It is a typical example of the -edged suffix.
Describes how someone acts or uses their hands: heavy-handed (harsh, lacking tact) and even-handed (fair, impartial).
Describes someone's tone or style of speaking: soft-spoken (speaking gently) and outspoken (speaking one's mind bluntly).
Describes how quickly someone thinks: quick-witted (sharp, fast-thinking) versus dim-witted (slow, not very sharp).
-tion, -ness, -ful, -ly, -able... every ending you need to understand thousands of words at once.