วัน • (wan)
From Sanskrit वन (vana, “forest”); probably via Old Khmer °vana, vana (“forest; grove; jungle; wood”). Compare Modern Khmer វន (vôn).
From Proto-Tai *ŋwanᴬ (“daytime”). Cognate with Lao ວັນ (wan), Lü ᦞᧃ (van).