mielenkiintoiseen

Mielenkiintoiseen is the illative singular form of the Finnish adjective mielenkiintoinen, meaning "interesting." In Finnish, adjectives inflect to agree with the noun they modify in case and number. The illative case expresses direction into something, and for adjectives of the -inen type the illative singular ending is -iseen, giving mielenkiintoiseen when describing a singular noun in illative. Example: Menen mielenkiintoiseen paikkaan (“I go to an interesting place”). The corresponding plural illative form is mielenkiintoisiin, as in Mennään mielenkiintoisiin paikkoihin (“We go to interesting places”).

Formation and etymology: mielenkiintoinen is built from mielenkiinto (“interest, curiosity”) plus the adjectival suffix -inen. The form mielenkiintoiseen reflects its grammatical role rather than a separate word.

Usage: The form is used wherever the illative case is required and the noun is singular; it can appear in descriptive statements, travel writing, journalism, and other prose. As with other Finnish adjectives, mielenkiintoinen has many inflected forms for different cases and numbers, and mielenkiintoiseen is just one of those forms.

Notes: mielenkiintoiseen demonstrates Finnish adjective agreement and case inflection, illustrating how a base adjective changes to convey grammatical relations. The related base form mielenkiintoinen is common in dictionaries, while mielenkiintoiseen appears in sentences where the noun is in illative singular.