だめ, 駄目, ダメ
NA-adjective
1. no good, not serving its purpose, useless, broken
2. hopeless, wasted, in vain, purposeless
3. cannot, must not, not allowed
go (game)
4. neutral point, intersection owned by neither player at the end of a game
Interjection
5. no!, stop!
もうだめだ。
だったら
Conjunction, See だ
if it's the case
だったら、私のお願いを聞いて欲しいの。それでチャラ。