unus et viginti

== Latin == === Alternative forms === vīgintī ūnus Symbol: XXI === Etymology === From ūnus (“one”) + et (“and”) + vīgintī (“twenty”). === Pronunciation === (Classical Latin) IPA(key): [ˈuː.nʊs ˈɛt wiːˈɡɪn.tiː] (modern Italianate Ecclesiastical) IPA(key): [ˈuː.nus ˈɛt viˈd͡ʒin.ti] === Numeral === ūnus et vīgintī (feminine ūna et vīgintī, neuter ūnum et vīgintī); first/second-declension numeral with an indeclinable portion, singular only twenty-one; 21 ==== Declension ==== First/second-declension adjective (pronominal declension) with an indeclinable portion, singular only. ==== See also ==== Appendix:Latin cardinal numbers