brackish Get Printable Handwriting (brack-ish) 2 syllables Rhymes Learn It! Spelling Test Definition adjective. 1 made up of a mixture of fresh water and seawater; salty; briny; 2 having an unpleasant taste. Example Sentence Brackish water is somewhat salty. Synonyms salty; briny; distasteful; unsavory Antonyms fresh spring water Rhymes Two Syllable Rhymes (1) brackish Share with your friends: