peukaloon

Peukaloon is the illative form of the Finnish noun peukalo, which means thumb. It is used to express movement toward the thumb or a location in relation to the thumb within a sentence. As a grammatical inflection, it serves to indicate direction rather than introducing a separate concept.

In Finnish, the illative case marks destination or direction inward. For stems ending in a vowel, the illative singular suffix is typically -oon, so peukalo becomes peukaloon. The illative singular is commonly used with singular nouns, while the plural illative often takes forms such as -iin or -ihin, yielding peukaloihin for the plural.

Other grammatical forms of peukalo include: nominative peukalo, partitive peukaloa, genitive peukalon, inessive peukalossa, and elative peukalosta. Like many Finnish body-part nouns, peukalo follows the standard case system, with the illative form peukaloon appearing in contexts requiring a directional or locative sense.

Usage notes: peukaloon is a routine part of Finnish grammar and appears in examples illustrating illative construction. The word itself refers specifically to the thumb; its illative form is not a separate lexical item but a morphological variant of the noun peukalo. Related discussions often appear in explanations of Finnish case systems and noun declension.