Appendix:Latin fourth declension

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Latin words of the fourth declension are generally masculines or, less commonly, feminines in -us and neuters in . The genitive is in -ūs.

Greek feminine proper nouns in -ω (genitive -ους) are declined as fourth-declension nouns in Latin.

The dative-ablative plural -ibus may less commonly appear as -ubus.


Masculine or feminine -us form[edit]

Citation form: manus, -ūs f

Case Singular Plural
nominative man-us man-ūs
genitive man-ūs man-uum
dative man-uī man-ibus
accusative man-um man-ūs
ablative man-ū man-ibus
vocative man-us man-ūs
locative man-ū man-ibus

Neuter -ū form[edit]

Citation form: cornū, -ūs n

Case Singular Plural
nominative corn·ū corn·ua
genitive corn·ūs corn·uum
dative corn·ū corn·ibus
accusative corn·ū corn·ua
ablative corn·ū corn·ibus
vocative corn·ū corn·ua
locative corn·ū corn·ibus

Feminine -ō form (from Greek)[edit]

Citation form: ēchō, ēchūs f

Case Singular Plural
nominative ēch-ō ēch-ūs
genitive ēch-ūs ēch-uum
dative ēch-uī ēch-ibus
accusative ēch-um ēch-ūs
ablative ēch-ū ēch-ibus
vocative ēch-ō ēch-ūs
locative ēch-ū ēch-ibus

See also[edit]