A __ Pill to Swallow Is an Unavoidable Unpleasantry

This page is the CodyCross answer for the clue below from Spa Time, Group 807, Puzzle 2 (Resort Amenities).

Question is: A __ Pill to Swallow Is an Unavoidable Unpleasantry

and the answer is: BITTER

Word Meaning:

BITTER — Having an acrid taste (usually from a basic substance).

Definitions from Wiktionary.