zwo

From Old High German zwō, from Proto-Germanic *twaōz, *twōz (see *twai), from Proto-Indo-European *dwóh₁. Zwo was originally feminine (see zween), but is now used as a variant of zwei without gender distinction. Compare, however, Luxembourgish zwou, which is still a feminine form of zwéin. The same is true of some German dialects, e.g. in Switzerland. More at two.

• IPA^(key): /t͡svoː/, [t͡sʋoː]

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zwo

1. (cardinal number) two

   Synonym: zwei

• Zwei is the usual German word for "two", but zwo is sometimes used as more clearly distinguishable from drei (“three”), especially over the telephone and in military parlance. Outside of these contexts, it is used chiefly in southern Germany and Austria.

zwo

1. feminine of zween

• “zwo” in Duden online
• “zwo” in Digitales Wörterbuch der deutschen Sprache