upewnisz

Upewnisz is a Polish verb form that means “you will make sure” or “you will reassure.” It is the second-person singular future tense of the perfective verb upewnić, which conveys a completed, decisive action such as ensuring something will happen or reassuring someone about a matter.

Etymology and grammar: The root is pewność, meaning certainty, linked to the adjective pewny (certain). The prefix u- marks completion or thoroughness, and the base verb upewnić belongs to the group of Polish verbs formed with -ić. As a finite form, upewnisz is used in statements or questions referring to a specific future action by the subject “you.” Its imperfective counterpart is upewniać, whose future forms differ (e.g., upewniasz, upewniasz, etc.) and which emphasizes ongoing or repeated assurance rather than a single completed act. The related reflexive form is upewnić się, used to mean “to make sure for oneself” (e.g., upewnisz się).

Usage: Upewnisz is commonly used in formal or instructional contexts, or in everyday dialogue when someone is asked to verify a detail or reassure another about a situation. It often appears with a subordinate clause starting with że: “Upewnisz się, że wszystkie dokumenty są podpisane.” It can also take a direct object in contexts such as “Upewnisz mnie, że to prawda,” meaning “You will reassure me that this is true.”

See also: upewnić się, upewnienie, zapewnić.

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