いっせいに
Meanings
Adverb
1. simultaneously; all at once; in unison
Dozens of magic knights begin to cast spells all at once.
Pitch accent
い
っせいに
Top 15100
Composed of
simultaneous; all at once
Examples (20 in total)
Everyone is talking at the same time.
People started to run all at once.
They started all at once.