noun
prompt reply; immediate answer
A quick response given without delay. Often used in contexts where a fast reply is expected or appreciated.
彼から即返事が来た。
I got a prompt reply from him.
メールには即返事をください。
Please give me a prompt reply to the email.
Compound of 即 (そく, 'immediate') and 返事 (へんじ, 'reply').