-kko

Merger of Proto-Finnic *-kko (in the three first senses) and *-kkoi (in the two latter senses); the latter is equivalent to -kka +‎ -o. Cognate with Estonian -k(u).

-kko (front vowel harmony variant -kkö)

1. Forms collective nouns.

   aallokko (“swell”), from aalto (“wave”)

   kehikko (“framework”), from kehä (“frame”)

   kolmikko (“threesome”), from kolme (“three”)

   nurmikko (“lawn”), from nurmi (“grass”)

   valjakko (“team”), from valjaat (“harness”)

2. Forms nouns denoting essential characteristics of a location.

   rannikko (“coast”), from ranta (“shore”)

   hietikko (“sands”), from hieta (“sand”)

3. Forms nouns from verbs denoting activities or tools for an activity.

   rynnäkkö (“attack”), from rynnätä (“to attack”)

   ylläkkö (“raid”), from yllättää (“to surprise”)

   valikko (“menu (computing)”), from valita (“to choose”)

4. Forms names for various beings.

   poliitikko (“politician”), from politiikka (“politics”)

   fyysikko (“physicist”), from fysiikka (“physics”)

   lumikko (“least weasel”), from lumi (“snow”)

   venakko (“Russian female”), from Venäjä (“Russia”)

5. Forms descriptive nouns.

   haulikko (“shotgun”), from hauli (“shot”)

In its collective senses, added to the plural stem of the base noun.

• KOK, kok.