Hioidaan

Hioidaan is a Finnish verb form that represents the present passive of the verb hioa, meaning to sand, grind, or polish a surface. It is used to describe a finishing process in a general or impersonal way, without specifying who performs the action. The form is common in technical, instructional, and DIY contexts, such as woodworking, metalworking, ceramics, and construction.

In sentences, hioidaan signals that the surface or material is undergoing treatment. For example, Pintaa hiotaan translates to The surface is being sanded. Kiveä hiotaan could refer to a stone being ground or smoothed with different abrasives. The object of the action is typically in the partitive case, reflecting the ongoing nature of the process. The phrase can refer to wood, metal, stone, plastic, or other materials, depending on the context.

Linguistic notes on usage and related terms: hioidaan forms part of a broader family around finishing processes. Nouns such as hionta (the act of sanding, grinding, or finishing) and hioma/koneko hiomakone (grinder or sander) accompany the verb in most technical texts. The adjective hiottu describes something that has already been finished by sanding or polishing. This terminology is prevalent in manuals, work-instruction sheets, and product specifications.

See also: hionta, hiomakone, hiottu, hiottava (to be polished), hiomakaivokone.