näppäimistöön

Näppäimistöön is the illative singular form of näppäimistö, a Finnish noun meaning keyboard. The illative case marks direction toward or into a destination and is used with verbs of motion, transfer, or placement. The form näppäimistöön is created by adding the illative suffix -ön to the stem näppäimistö; in this instance the final -ö remains intact. Today the term covers both physical keyboards and virtual or on-screen keyboards.

Usage and meaning. Näppäimistöön expresses actions directed at or involving the keyboard, such as connecting to it, inserting data with it, or transferring something onto the keyboard. Examples (illustrative): "Laite liitettiin näppäimistöön." "Syötä PIN-koodi näppäimistöön." In many contexts it functions as part of the broader set of Finnish illative forms used with devices, software prompts, and user interfaces.

Etymology and forms. The word is a compound formed from näppäin (key) and -istö (a noun-forming suffix related to a group or collection), with the illative suffix -ön producing näppäimistöön. Related forms include näppäimistön (genitive), näppäimistöä (partitive), and näppäimistö (nominative). See also Finnish grammar on the illative case and the head noun näppäimistö.

Notes. Finnish utilizes cases to express location and direction, and illative forms vary by noun. Näppäimistöön is the standard illative form for this noun in contemporary usage.