barbed comes from barb plus the adjectival suffix -ed; barb is from Old French barbe, from Latin barba ('beard'). Morphologically, the word is transparent: -ed is attached to the older base named in the history, so the modern form packages an inherited or borrowed stem inside a later English derivative. In modern use, the adjective sense is "having sharp projecting points; also pointedly critical", which keeps the etymology connected to the word's present dictionary value rather than treating it as a merely historical label. The wider word family includes related English forms such as barb, barbless, showing how the same base continues to support neighboring English vocabulary. The principal historical forms in the chain include Old French barbe, Latin barba, which anchor the explanation in named linguistic material.