速 - quick, fast

express intercity bus

(very) quick; rapid; swift; speedy; prompt; expeditious

supersonic speed

quickness; agility; activity

rough-and-ready; knocked-up; hasty; slipshod; slapdash

highway; freeway; expressway; motorway

speed; velocity; quickness; rapidity

speed

high speed

full speed

rapid (e.g. progress)

high-speed; rapid; express