to wind or move in a spiral course; "the muscles and nerves of his fine drawn body were coiling for action"; "black smoke coiling up into the sky"; "the young people gyrated on the dance floor"
diffusion of molecules through a semipermeable membrane from a place of higher concentration to a place of lower concentration until the concentration on both sides is equal
having or showing knowledge and skill and aptitude; "adept in handicrafts"; "an adept juggler"; "an expert job"; "a good mechanic"; "a practiced marksman"; "a proficient engineer"; "a lesser-known but no less skillful composer"; "the effect was achieved by skillful retouching"