Free from error; true; accurate.
With good manners; well behaved; conforming with accepted standards of behaviour.
Used to indicate acknowledgement or acceptance.
To make something that was wrong become right; to remove error from.
To discipline; to punish.
To inform (someone) of their error.
To grade (examination papers).
A correct response.
Not valid; not true, correct, acceptable or appropriate.
Suffering from disability or illness.
Intended for use by an invalid.
To make invalid or affect with disease.
To exempt from (often military) duty because of injury or ill health.