Two is a noun when it refers to the number two as in two plus two is four. The word two is derived from the Old English words twā (feminine), tū (neuter), and twēġen (masculine, which survives today in the form twain).
Two strangers awaken to discover their abdomens have been sewn together, and are further shocked when they learn who's behind their horrifying ordeal. Watch trailers & learn more.
From Middle English two, twa, from Old English twā, feminine and neuter of twēġen (whence twain), from Proto-West Germanic *twai-, from Proto-Germanic *twai, from Proto-Indo-European *dwóh₁.