-Vn

Etymology 1
From where the -h- has been elided between unstressed short vowels.

Usage notes

 * See the appendix on Finnish nominal cases for more information on how the illative case is used.
 * Used after an unstressed short vowel. The vowel is the same as the final vowel in the stem, thus producing a long vowel.

Etymology 2
From, from (third-person singular possessive suffix).

Usage notes
Can always be replaced with, the longer third-person possessive suffix, but not the other way around. Specifically, can be used:
 * when the vowel preceding is a short a, ä and e (general rule, but defers to the next two)
 * for nominal inflections (including participles and adverbs derived from such), all cases except the nominative, genitive, illative and instructive
 * for verbal inflections, the long 1st infinitive, the 2nd infinitive, and the 5th infinitive

Etymology 3
From the illative ending (etymology 1) attached directly to the verb stem.

Usage notes

 * Example: = standard.
 * Originally a Tavastian dialectal characteristic, but nowadays can be encountered in urban "non-dialectal" speech.