katteissa
Katteissa is a term that appears in discussions of Finnish language and grammar. It can be interpreted as a locative inflection related to a word meaning roof, and would convey a sense of location inside or within roof structures. In Finnish, locative forms such as this are used to indicate where something is located, and they are formed by combining a noun with suffixes that signal position.
Etymology and morphology: the root would be a word associated with roofs, such as katto, and the
Usage and interpretation: as a grammatical form, katteissa serves to specify location relative to roofed spaces
If you intended katteissa to refer to a particular project, work, or place, please provide additional context.