Appendix:Finnish possessive suffixes

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Finnish has a system of possessive suffixes. There are five distinct suffixes, depending on the person that is acting as the possessor:

possessor singular plural
1st person -ni -mme
2nd person -si -nne
3rd person -nsa, -nsä

The suffixes themselves make no distinction for the number of the possessed, but can be attached to inflected forms; that is, words can be inflected even if they have a possessive suffix. The first-person singular possessive suffix has an alternative version, -in, which is poetic and thus chiefly used in poetry and music.

The suffix attaches to the end of the word, but assimilates a final -n in the genitive and illative forms. Note that there are no separate nominative forms for inflected words; both the nominative singular and plural have identical forms to the genitive singular, if a possessive suffix is present.

The first-person and second-person suffixes can be used to not just supplant, but also replace the pronoun, which can be omitted if a possessive suffix is present; thus taloni and minun taloni are synonymous. The third-person suffix however in many cases still requires the third-person pronoun (except with reflexive usage) or another corresponding pronoun and is not used if the headword in genitive is not a pronoun (such as if it is a name). In colloquial language, possessive suffixes are usually not used, with pronouns in genitive being the preferred option.


Most nouns can receive a possessive suffix. In addition, the comitative case requires a possessive suffix for nouns (but not adjectives).


Adjectives usually do not receive a possessive suffix, even when used with a noun that has a possessive suffix. Thus, as an example, ×keltaiseni autoni is wrong, and should instead be keltainen autoni.

However, if the adjective is used being substantively, i.e. without a modifying noun, it may receive a possessive suffix.

In addition, adjectives used for comparisons of equality (such as ikäinen (of ... age, as old as), pituinen (of ... length, as long as) etc.) can receive a possessive suffix (such as ikäiseni (of my age, the same age as me, as old as me)). In this case, the modified noun does not automatically receive a possessive suffix.


Some adverbs receive a possessive suffix, and out of those most require it. Finnish has predicative adverbials (list), all of which require a possessive suffix.

Verb phrases[edit]

In some verb phrases, the object or some other word may receive a possessive suffix. There are two main types:

  • reflexive verbs, in which the possessive suffix corresponds to the person of the verb
  • non-reflexive verbs, in which the possessive suffix corresponds to the object; the possessive suffix is only used if the object is a personal pronoun
    • for first-person and second-person pronouns, the pronoun may be omitted if the possessive suffix is used
    • for third-person pronouns, the third-person pronoun must be included, since a third-person possessive suffix without a person has a reflexive meaning (object = self)


Agent participles require either a possessive suffix or a subject in genitive. For other types of participles, possessive suffixes are used as for adjectives.

Verb forms[edit]

Some verb forms, including participles, have special uses for possessive suffixes:

  • present active participle in genitive singular, with verbs like tajuta (to realize), ymmärtää (to understand), pelätä (to fear, be afraid): "(subject) would/will..."
    hän pelkäsi joutuvansa... – he/she was afraid he/she would end up (in)...
  • inessive of active second infinitive: "while/as (subject) is/was..."
    (minun) katsoessani... – while/as I was watching...
  • past passive participle in partitive singular: "(subject) having done..."
    (minun) katsottuani... – (me) having watched... / after I watched...
  • long form of the first infinitive (requires a suffix): "in order for (subject) to do..."
    tehdäksesi – in order for you to do
  • fifth infinitive (requires a suffix): "(subject) was about to..."
    olimme ostamaisillamme sen – we were about to buy it
  • (uncommon, optional) instructive of active second infinitive: "while (subject)..."
    minun nähteni – before my eyes, before me ("as I was watching")


Certain postpositions, such as kanssa or luona, can also receive a possessive suffix. For some, such as mielestä, it is required when the complement is a personal pronoun; thus henkilön mielestä and jonkun mielestä, but hänen mielestään and (minun) mielestäni (however, in colloquial use, the suffix is often dropped here).


(Cardinal) numerals cannot receive a possessive suffix.

See also[edit]