These nouns end in a long -uu in the singular and keep this long -uu with all the other inflectional endings.
ᐋᒨaamuu (na) bee
3′ / 3’p
ᒦᒋᒫᐴmiichimaapuu (ni) meat broth
0p / 0’p
Nouns ending with -uu (-iw)
These nouns end with a long -uu in the singular, but with some inflectional endings, an -ii appears. Originally, those nouns ended in -iw. You can still hear it with elder speakers or see it in a verb like ᐱᒌᐧᐋᔅᑯᓐpichiiwaaskunit has gum on it. While their singular, plural or obviative is written with a –u ending, you can still hear the -i today in the locative, diminutive and possessive.
Nouns ending with -eu do not keep their -u in the locative, simulative and possessive. The first vowel of the suffixes (i) also disappears in all the endings. The stem and the suffix undergo a contraction.