いっぺんだけ会ったことがある。
I've met him just once.
いっぺんに全部はできないよ。
I can't do it all at once.
Attaches to nouns to mean 'nothing but' or 'solely'. Common in set phrases like 正直一遍 (nothing but honesty) or 義理一遍 (just out of obligation).
彼のやり方は義理一遍で、心がこもっていない。
His way of doing things is just perfunctory, with no real feeling.
あの人は正直一遍で、融通がきかない。
That person is nothing but honest and lacks flexibility.
It's hard to memorize this kanji in a single try.
Well, let's just give it a try once.
perfunctory; superficial; conventional · chance; transient; stray