virheettömiin
Virheettömiin is a Finnish grammatical form of the adjective virheetön, meaning "without mistakes" or "flawless." It represents the illative plural form used when the adjective modifies a plural noun in the illative case (the case used to indicate direction into something). In other words, virheettömiin describes plural nouns into which something is moving or directed, with the sense of “to flawless [things/actions]” or “into flawless targets.”
The root virheetön derives from virhe, “mistake,” with the negative suffix -tö- and the adjectival ending -n.
Finnish adjectives agree with the nouns they modify in number and case. When the noun is plural
Virheettömiin tends to appear in more formal, technical, or literary registers where specific directional or evaluative
Virheetön, Finnish adjective declensions, Finnish illative case.