もっぺん

once more; one more time; again

Word type: 

Standard: 

もういっかい

Standard kanji: 

もう一回

Example: 

もっぺん言うて。
Could you say that again?

Commentary: 

"へん" is a Kansai-ben counter that takes the same space as the more standard "かい". Also see もっかい.