instantly

Etymology

From instant + -ly.

adv

1. At once; without delay.
   When the neighbours' dog barked, ours instantly replied with a howl.
   The most persistent tormentor was Alex Oxlade-Chamberlain, who scored a hat-trick in last month’s corresponding fixture in Iceland. His ability to run at defences is instantly striking, but it is his clever use of possession that has persuaded some shrewd judges that he is an even better prospect than Theo Walcott. November 10, 2011, Jeremy Wilson, “England Under 21 5 Iceland Under 21 0: match report”, in Telegraph
   But signalman Bridges was never to answer driver Gimbert's desperate question. A deafening, massive blast blew the wagon to shreds, the 44 high-explosive bombs exploding like simultaneous hits from the aircraft they should have been dropped from. The station was instantly reduced to bits of debris, and the line to a huge crater. January 12 2022, Benedict le Vay, “The heroes of Soham...”, in RAIL, number 948, page 43
2. (archaic) Urgently; with insistence.
3. (obsolete) At the same time.

conj

1. As soon as, directly.
   I phoned instantly I heard you were back.