いっぺんに

Usually written in kana. Kanji spelling 一遍に

(all) at once; at the same time; in one go; in one sitting

Common word

Meanings

Adverb
(all) at once; at the same time; in one go; in one sitting
right away; in an instant

Example sentences

一遍いっぺんに2か国語こくごも習ならってるの？

Are you learning two foreign languages at the same time?
一遍いっぺんに二ふたつのことはできないよ。

I can't do two things at a time.
爪つめを切きるのとアイロンがけは、一遍いっぺんにはできないよ。

I can't cut my nails and do the ironing at the same time!