To hinder or thwart.
To cause stress or annoyance.
To disappoint or defeat; to vex by depriving of something expected or desired.
ineffectual; useless; fruitless.
To decelerate; to slow down.
To put off; to postpone.
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.