This is the 686th most frequent Czech word.
okamžitě
"Immediately"
Denotes urgency and necessity to act on the spot.
Okamžitě zavolej hasiče!
Call the firefighters immediately!
Emphasizes that the action of fixing must happen without delay.
Chci, abys to okamžitě napravil.
I want you to fix it immediately.
Used to describe the instant realization by the speaker.