Hebrew:
Several words could be used, depending on context:
* כְּעֵת (ke'et): This means "at the time," "at once," or "immediately." It's a good general option.
* מִיָּד (miyad): This is closer to "immediately" or "right away." It implies a very short time lapse.
* בְּאוֹתוֹ רֶגַע (be'oto rega'): This translates to "in that moment" or "at that instant," suggesting a more precise immediacy.
* פִּתְאֹם (pita'om): This means "suddenly" or "unexpectedly," and while it implies immediacy, it adds the element of surprise.
Greek:
Similarly, Greek offers several options:
* εὐθύς (euthús): This is a common and versatile word meaning "immediately," "straightway," or "at once." It's a good general choice.
* παραχρῆμα (parachrēma): This means "immediately," "on the spot," or "forthwith," suggesting a more forceful or decisive immediacy.
* αὐτίκα (autika): This word means "immediately," "instantly," or "at once," emphasizing speed.
* ἐν παραχρῆμα (en parachrēma): This is a prepositional phrase meaning "immediately."
The best choice in either language depends heavily on the specific context of the sentence.