From Proto-Vietic *ʔa-kaːʔ, from Proto-Mon-Khmer *kaʔ. Cognate with Vietnamese cá, Khmer កា (kaa, “prefix for fish”), Pacoh aca, Bahnar ka, Khasi 'kha/dohkha, Mon က (kaˀ), Car Nicobarese kāḵ.
ก้า (transliteration needed)