kypäriin

Kypäriin is the illative case form of the Finnish noun kypäri, meaning helmets. The form literally translates to “into helmets” or, in context, “into a helmet,” and is used to indicate movement toward or into the helmet(s).

In Finnish grammar, illative forms express direction and are part of the system of cases that specify location and movement. The illative singular of kypäri is kypäriin, whereas the illative plural would take a different ending (often depending on the stem). The choice between singular and plural illatives depends on the noun’s number and the intended meaning.

Usage notes: the illative form kypäriin is relatively uncommon in everyday speech because helmets are typically worn rather than entered. It more often appears in specific or technical contexts, such as instructions for equipment setups, cosplay, or manufacturing where items are placed into a helmet, or in poetic or descriptive language. In ordinary discourse about wearing a helmet, expressions like “kypäri päässä” (helmet on the head) are preferred.

Examples:

- Hän asetti valaisimen kypäriin. (He placed the light into the helmet.)

- Työlaitteet siirrettiin kypäriin ennen kiinnitystä. (The tools were moved into the helmets before attachment.)

See also: Finnish grammar, illative case, kypäri (helmet).