also: あかーん
expression
Kansai dialect expression meaning something is unacceptable, hopeless, or not allowed. Often used with i-adjective inflections like あかんかった (was no good) or あかんくない (isn't it no good?).
そんなことしたらあかん。
You mustn't do that.
このケーキ、もうあかんわ。
This cake is no good anymore.
expression
Expresses prohibition or impossibility, equivalent to standard Japanese だめ or いけない. Stronger than simple inability.
ここでタバコ吸ったらあかんで。
You can't smoke here.
もう時間がないから、急がないとあかん。
There's no time left, so we have to hurry.