unexpectedly, immediately, abruptly, promptly, instantly, suddenly

instantly

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suddenly, abruptly, instantly, rapidly

suddenly, abruptly, immediately, instantly, promptly, unexpectedly

rapidly, suddenly, at once, quickly, instantly

instantly, momentarily

forthwith, instant, instantly, offhand

instantly, suddenly

instant, instantly

instantly

immediately, most urgently, instantly, pressingly

immediately, instantly, forthwith, at once

immediately, right away, instantly, promptly, at once