To launch; to run.
To excite; to infuse with energy.
Of an engine or similar, to start.
To ignite.
To put off; to postpone.
To decelerate; to slow down.
To keep delaying; to continue to hinder; to prevent from progressing.
Retardation; delay.
A slowing down of the tempo; a ritardando.
A person or being who is extremely stupid or slow to learn.