但是

dànshì
but; however

CEDICT

Entry Composition

1 但 dàn
  1. but; yet; however; still
  2. merely; only; just
=2 是 shì
  1. to be (followed by substantives only)
  2. correct; right; true
  3. (respectful acknowledgement of a command) very well
  4. (adverb for emphatic assertion)
=2 是 shì variant of 是 shì