to/until the bitter end

: to

used as a function word to indicate continuance (as of an action or condition) to a specified time

: before

: up to the time that : up to such time as

: being or inducing the one of the four basic taste sensations that is peculiarly acrid acrid, astringent, or disagreeable and suggestive of an infusion of hops — compare salt, sour, sweet

: distasteful or distressing to the mind : galling

: marked by intensity or severity:

: bitter (see ¹bitter) quality

: a usually alcoholic solution of bitter and often aromatic plant products used especially in preparing mixed drinks or as a mild tonic (see ¹tonic 1b)

: a very dry (see ¹dry 7b) heavily hopped ale

: to make bitter (see ¹bitter)

: to an intense or severe degree : to a bitter (see ¹bitter) degree

: the part of an area that lies at the boundary

: a point that marks the extent of something

: the point where something ceases to exist

: to bring to an end

: destroy

: to make up the end of

: final, ultimate

: to put (grain or hay) into a barn or stack

: within : inside — compare ect-, exo-

: taking in