The Proto-Semitic word ġarb
Word ġarb
Meaning sunset, evening
Synonyms ʾamš

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
nwr ‘light, to shine’, θ̣lm ‘black, darkness’, nīr, nūr ‘light’, nVgVh ‘shine’, ṯ̣il(l) ‘shadow’, ʾiš ‘fire’, śamš ‘sun’