n.

the final extremity (however unpleasant it may be)

(nautical) the inboard end of a line or cable especially the end that is wound around a bitt

Bitter End
Bitter End
BITTER END
The Bitter End: Emotions at a Movement's Conclusion
Anti-D3's - Singular to the Bitter End
Until the Bitter End: On Prospect Theory in a Dynamic Context
The Bitter End The Ubiquitin-Proteasome System and Cardiac Dysfunction
Anti-D3 Branes: Singular to the bitter end
To the bitter end: An insider's account of the plot to kill Hitler, 1933-1944
To the bitter end : the dramatic story behind the fall of John Howard and the rise of Kevin Rudd
LIVING TO THE BITTER END? A PERSONALIST APPROACH TO EUTHANASIA IN PERSONS WITH SEVERE DEMENTIA
The Bitter End and the Lost Chance in Vietnam: Congress, the Ford Administration, and the Battle Over Vietnam, 1975–76
TAS2R38 taste receptor gene and chronic rhinosinusitis: a bitter ending