Meaning : Without delay or hesitation. With no time intervening.
Example :
He answered immediately.
Found an answer straightaway.
An official accused of dishonesty should be suspended forthwith.
Come here now!.
Synonyms : at once, directly, forthwith, immediately, like a shot, now, right away, straight off, straightaway
Meaning : Without any delay.
Example :
He was killed outright.
Synonyms : in a flash, instantaneously, outright
Instantly meaning in Bengali (Bangla).