English
Etymology
Old English twa, from Germanic *twai, *two, from PIE *dwô. Cognate to German zwei, French deux, Greek δυο, Russian два. Combining form twi-, cognate to German zwi-, Sanskrit દ્વિ dwi-.
Cardinal number
- Arabic numerals: 2
- Chinese numerals: 貳, 二
- Roman numerals: II
The cardinality of the set {0, 1}; one plus one. The number of eyes that a typical human has.
The ordinality of an element whose predecessor is first; usually called second but sometimes number two.
