Without a blade; lacking a cutting edge or the blade-like part that would normally be present.
From Old English 'blæd' (blade) + '-less' (suffix meaning without). This opposite of 'bladed' shows how '-less' creates negations in English.
Ironically, one of the coolest 'bladeless' inventions is Dyson's bladeless fan, which moves air using invisible air jets—it sounds futuristic but nature invented similar designs millions of years ago!
Complete word intelligence in one call. Free tier — 50 lookups/day.