The phrase "waters of bitterness" can refer to a range of different emotions, experiences, and situations. Some common synonyms for this phrase include "troubled waters," which connotes difficulty or turmoil in relationships or other areas of life; "tainted waters," which suggests the presence of corruption or negativity in a particular situation; and "bitter currents," which suggests a sense of ongoing struggle or challenge. Other possible synonyms for this phrase might include "acrid fluids," "sour streams," "astringent aqueous solutions," or "frosty sources." Each of these expressions can capture different nuances and aspects of the complex emotional and psychological experience often associated with the idea of "waters of bitterness".