Covered with barnacles, which are small hard-shelled sea creatures that attach to ships and rocks.
From barnacle (Middle English bernacle, from Old French bernacle), a crustacean that attaches to surfaces, plus the suffix -ed meaning 'covered with' or 'having.'
Barnacles are so good at sticking that ships lose speed when covered with them—medieval sailors didn't realize these crusty creatures were alive and thought they were just rocky growths!
Complete word intelligence in one call. Free tier — 50 lookups/day.