-ui

As the nominative and vocative plural ending for the second declension suffix -uus, unknown, but displaced Proto-Italic *-wosjo, genitive singular of *-wos. As the dative singular for fourth declension nouns, from Proto-Italic *-owei, dative singular of *-us.

-uī

1. inflection of -uus:
   1. nominative/vocative masculine plural
   2. genitive masculine/neuter singular (second declension)
2. dative masculine/feminine singular of -us (fourth declension)

This ending is no longer used for neuter nouns in the fourth declension, being ousted by -ū, which now occupies all endings in the singular of neuter nouns except the genitive singular, which has -ūs. The fourth declension is the only declension group to have different dative singular forms between neuter nouns and non-neuter nouns.

-ui

1. Romanization of -𐌖𐌉

Probably from Latin -uneus, cf. -eus.

• IPA^(key): /uj/

-ui m or n (feminine singular -uie, plural -ui)

2. Forms adjectives denoting characteristics or qualities, especially relating to color, and often with the meaning of -ish.

• albui, albăstrui, amărui, căprui, gălbui, verzui

• -iu

Modelled after Proto-Slavic *-ovati.

• IPA^(key): /uˈi/

-ui

2. Forms verbs.