2271: Zwei...Zwene, & Zwo? Mar 5, 2021

The German word for 2, 'zwei' is not declined like a regular adjective in German. Historically, all three grammatical genders were used, including 'zwene' or 'zween' for the masculine which has entirely dropped out, and the feminine 'zwo' which is a variant sometimes used for clarity with 'drei' (three), such as in military radio transmissions. This loss of gender in cardinal numbers is not universal in German with 'eins' (one) declined normally; moreover, Luxembourgish and certain Swiss German dialects still feature variants like 'zwou' and 'zwéin' [Luxembourgish]. It does elucidate the connection to the English 'twain'—also historically the masculine form of 'twā' [feminine]—but in the case of 'twain' this was later used more broadly before certain types of words such as nouns as to disambiguate between it and 'to' or 'too', thus outlasting the general breakdown of English's grammatical gender.