Etymology

From Sanskrit मास ‎(mā́sa) +‎ -ము ‎(-mu), from Proto-Indo-Iranian, from Proto-Indo-European *mḗh₁n̥s ‎(“moon; month”), from *meh₁- ‎(“to measure”). Cognates include Latin mensis, Ancient Greek μήν ‎(mḗn), Old Persian 𐎶𐎠𐏃 ‎(māha) and Old English mōnaþ, mōna (English month, moon).