Abverb
English: by the way, parenthetically
Japanese: ところで, ちなみに
KLCP:
Notes
This comes at the beginning of a sentence. This is the full form. In everyday conversation, 'ej and/or De' (and even vI-) are often omitted. Klingon grammarians argue about whether the resulting De'chel should be considered an adverbial in its own right.