The Proto-Semitic word yamm
Word yamm
Meaning sea
Synonyms baḥr

Comments
Kaye, Alan S. "Christopher Ehret. Reconstructing Proto-Afroasiatic (Proto-Afrasian): Vowels, Tone, Consonants, and Vocabulary", University of California 1995

Other words that might be of interest
maʾ, may ‘water’