Forthwith (adverb)

1. Immediately, without delay.
2. At once; immediately; without delay or hesitation.

Origin:

From old english forthwiþ, from forth + wiþ ("with"), meaning immediately, without delay.

Examples:

1. The order was to be carried out forthwith.
2. He was told to leave forthwith.
3. The company requested that the payment be made forthwith.
4. The witness was asked to come forthwith to the police station.
5. The matter was to be dealt with forthwith.