Retardation; delay.
A slowing down of the tempo; a ritardando.
A person or being who is extremely stupid or slow to learn.
To put off; to postpone.
To decelerate; to slow down.
To keep delaying; to continue to hinder; to prevent from progressing.
To increase the speed of an engine, especially that of a stationary motor car.
To become more active.
To make (someone or something) more active.