immediately; right away; at once
Standard adverb for doing something without delay; natural in both casual and formal contexts.
See also: すぐ
すぐに戻ります。
I'll be right back.
He replied immediately.
If the phone rings, please answer it right away.
I could tell right away that he was lying.
I'm going out for a bit, but I'll be right back.
すぐに means 'immediately' and feels more urgent, while 直に (sense 'soon') suggests a slightly more relaxed near-future expectation.
すぐに is a general word for 'soon' or 'right away', while 咄嗟に emphasizes a reflexive, split-second reaction to an unexpected event.
すぐに means 'right away/immediately' and stresses lack of delay, whereas 早く means 'early' relative to an expected time.
すぐに just means 'immediately' or 'soon', whereas あっという間に adds the subjective sense that the speed was surprising.
すぐに just means 'immediately' in general contexts, while 途端に specifically links two events so that the second happens right after the first, often unexpectedly.
すぐに is a neutral, standard word for 'immediately', while とっとと is colloquial and often carries a demanding, brusque tone.
すぐに is the everyday, casual way to say 'right away', while 即座 sounds a bit more formal and emphasizes the instantaneous, on-the-spot nature of a response.