Part of speech: numeral
1. one; 2. gram mean of an adv only
Etymology
[Mod E ONE (numer), A, AN (art) ← Prot-Germ *ainaz; Goth ains; O Fris ān, ēn; O Sax ēn; Dt een; OHG ein (Mod G ein); Icel einn ← Indo-Europ *oino-; Lat ūnus; O Ir óen]