What is the 4th declension in Latin?
Latin words of the fourth declension are generally masculines or, less commonly, feminines in -us and neuters in -ū. The genitive is in -ūs. The dative-ablative plural -ibus may appear less commonly as -ubus.
What are 4th declension words?
A few 4th declension nouns appear unchanged in English: status, sinus, census, consensus, hiatus, apparatus. If you should want to pluralize any of these words in English, and you mean to follow Latin practice, you will not change the word in spelling—the Latin plural of census is census.