if you are in a meeting and you are arguing in support of a particular position, but you see that everyone else is against you, you could back down so that the meeting can proceed. ------ back down.
Echarse para atras, to stop holding to that position, to withdraw from a position, opinion, or proposal. retroceder, echar hacia atras.
If you promised to help your friend move to a new apartment, but then you call her later and say you're not available, then you are backing out... back out.
Write up is used for taking a larger amount of information and putting it into a formal report that will probably be published or distributed to other people... write up.
if you want to talk to your husband before finalizing anything, you could say, "Let me hold off until I can talk to my husband about this........ hold off.