birden, birdenbire

listen to the pronunciation of birden, birdenbire
Türkçe - İngilizce
all at once
Unexpectedly; without warning; all of a sudden

When all at once I saw a crowd, A host, of golden daffodils - William Wordsworth, Daffodils.

without warning; "all at once, he started shouting"
suddenly, at one time, simultaneously
all at the same time; "Let's say `Yes!' all at once"
Türkçe - Türkçe
yekten
birden, birdenbire