Liiveihin
Liiveihin is the illative plural form of the Finnish noun liivi, which means vest or waistcoat. As an illative, liiveihin expresses movement toward or into multiple vests, for example in contexts describing putting on or entering several garments.
In Finnish grammar, the illative case marks direction into something, and the plural illative endings vary
Usage of liiveihin is largely confined to descriptive grammar, linguistic discussions, or examples illustrating Finnish case
See also: Finnish grammar, illative case, noun inflection, Finnish plurals.