korostuj

Korostuj is the second-person singular imperative form of the Polish verb korostować. The verb means to sharpen or whet the edge of a tool or blade, typically using a whetstone, file, or sharpening wheel. In a broader sense, korostować can also mean to refine, hone, or polish a skill, performance, or object.

Usage and scope: Korostuj appears mainly in instructional, technical, or crafts-related contexts, such as manuals for knives, tools, or metalworking. The imperative is used to direct someone to perform sharpening. Related verbs include ostrzyć (a more common term for sharpening) and naostrzyć (to sharpen to a fine point). The form korostuj is complemented by korostujmy (let us sharpen) and korostujcie (you all sharpen).

Grammar and morphology: Korostować is the infinitive; korostuje is the present third-person singular, and korostują the present third-person plural. Imperatives include korostuj (ty), korostujmy (my), korostujcie (wy). Like other Polish verbs, past tense forms depend on the speaker’s gender and number (e.g., korostowałem, korostowałaś).

See also: ostrzyć, naostrzyć, ostrzenie. In Polish language resources, korostować is listed as a specialized term within tools and crafts vocabulary, with korostuj functioning as its most common imperative form in direct instruction.

Note: There is no widely recognized proper noun or organization named “Korostuj.” The entry here focuses on its linguistic usage as a verb form in Polish.