~cha ～ちゃ

In Japanese, ~cha ～ちゃ is a contraction of ~te wa ～ては. Although sometimes it means "tea," ocha お茶.

A couple of examples:

• hito wo koroshicha dame
  人を殺しちゃダメ
  Killing people: no good. (literally.)
  You shouldn't kill people.
  • hito wo koroshite wa dame
    人を殺してはダメ
    (same meaning.)
  • dame ダメ
    No good.
• kangaecha-iru-n-da
  考えちゃいるんだ
  Thinking, [I] am.
  • kangaete wa iru no da
    考えてはいるのだ
    (same meaning.)