riistu
Riistu is a grammatical form in Estonian derived from the noun riist, which broadly means tool, instrument, or piece of equipment. The base noun can refer to any implements used to perform a task, from household utensils to specialized apparatus in crafts or industry. The plural nominative form for the countable noun is riistad. Riistu appears as an inflected form in several cases and numbers, depending on syntactic role; its exact meaning shifts with case, number, and surrounding words. In everyday language, speakers typically use the base form riist for the general concept, or riistad when referring to several items. The form riistu is encountered in writing and speech when the noun is used in non-nominative roles, for example as a direct object or in other grammatical cases, with case endings marking the function in the sentence. The distinction between riistu and riistad is primarily grammatical rather than lexical.
Semantic notes: The Estonian riist should not be confused with Finnish riista, which means game animals or