soomi

Ingrian

soomi

(in the plural) Finns
(in the singular) Finnish language
- 2008, “Läkkäämmä omal viisii [We're speaking [our] own way]”, in Inkeri‎^[1], volume 4, number 69, St. Petersburg:
  No höö soomeks läk[k]äisiit, evät läännehet ko möö paraikaa läkkäämmä.
  Well, they spoke Finnish, they didn't speak like we speak now.

Declension of soomi (type 5/lehti, no gradation)
	singular	plural
nominative	soomi	soomet
genitive	soomen	soomiin, soomiloin
partitive	soomia	soomija, soomiloja
illative	soomee	soomii, soomiloihe
inessive	soomees	soomiis, soomilois
elative	soomest	soomist, soomiloist
allative	soomelle	soomille, soomiloille
adessive	soomeel	soomiil, soomiloil
ablative	soomelt	soomilt, soomiloilt
translative	soomeks	soomiks, soomiloiks
essive	soomenna, soomeen	soominna, soomiloinna, soomiin, soomiloin
exessive¹⁾	sooment	soomint, soomiloint
¹⁾ obsolete ^) the accusative* corresponds with either the genitive (sg) or nominative (pl) ^) the comitative** is formed by adding the suffix -ka^? or -kä^? to the genitive.

Ruben E. Nirvi (1971) Inkeroismurteiden Sanakirja, Helsinki: Suomalais-Ugrilainen Seura, page 543

soomi

Declension of soomi (type VII/nimi, no gradation)
	singular	plural
nominative	soomi	—
genitive	soomõ	—
partitive	soomia	—
illative	soomõsõ, soomõ	—
inessive	soomõz	—
elative	soomõssõ	—
allative	soomõlõ	—
adessive	soomõllõ	—
ablative	soomõltõ	—
translative	soomõssi	—
^) the accusative* corresponds with either the genitive (sg) or nominative (pl) ^) the terminative** is formed by adding the suffix -ssaa to the short illative (sg) or the genitive. ^*) the comitative** is formed by adding the suffix -ka to the genitive.

Hallap, V., Adler, E., Grünberg, S., Leppik, M. (2012) “soomi”, in Vadja keele sõnaraamat [A dictionary of the Votic language], 2nd edition, Tallinn