Breakneck – : very fast : dangerously fast
http://www.merriam-webster.com/dictionary/breakneck
Used in Beloved on page 52, the top of the page and the begging of the first paragraph.
Four days she slept, waking and sitting up only for water. Denver tended her, watched her sound sleep, listened to her labored breathing, and out of love and a breakneck possessiveness that charged her, hid like a personal blemish Beloved’s incontinence.
I think that this word describes how quickly Denver felt passive and drawn to Beloved, almost like a immediate obsessiveness that she felt towards her.
