ଅର୍ଥ : Without delay or hesitation. With no time intervening.
ଉଦାହରଣ :
He answered immediately.
Found an answer straightaway.
An official accused of dishonesty should be suspended forthwith.
Come here now!.
ସମକକ୍ଷ : at once, directly, forthwith, immediately, instantly, like a shot, now, straight off, straightaway
ଅର୍ଥ : At once (usually modifies an undesirable occurrence).
ଉଦାହରଣ :
He promptly forgot the address.
ସମକକ୍ଷ : promptly