nieszczelnymi

Nieszczelnymi is the instrumental plural form of the Polish adjective nieszczelny, which means not tight or not sealed (leaky). It is used to describe plural nouns in the instrumental case, typically in technical or descriptive contexts, indicating leakiness, poor sealing, or a lack of airtightness.

Etymology and form: nieszczelny is formed by the negation prefix nie- attached to szczelny, meaning tight or sealed. The word declines like a regular Polish adjective: masculine singular nominative nieszczelny, feminine singular nominative nieszczelna, neuter singular nominative nieszczelne; plural nominative nieszczelni (masculine personal) or nieszczelne (other genders); instrumental plural is nieszczelnymi. The form nieszczelnymi is therefore used when describing multiple nouns in the instrumental case, e.g., with verbs or prepositions that govern the instrumental.

Usage: nieszczelnymi is common in engineering, construction, plumbing, HVAC, and other technical contexts, as well as in everyday speech when referring to objects or systems that are not airtight or leak-proof. Examples include:

- Z nieszczelnymi oknami trzeba coś zrobić. (There are leaky windows that need fixing.)

- Z nieszelnymi uszczelkami może dojść do wycieku. (With leaky gaskets, a leak may occur.)

- W systemie nieszczelnymi połączeniami grozi wyciek płynów. (The system with leaky connections risks fluid leakage.)

Relation to related terms: nieszczelnymi is the opposite of nieszczelnym? The antonym is szczelny, meaning tight or sealed, with corresponding forms such as szczelne okna or szczelne połączenia.

See also: szczelność, szczelny. These terms cover the concept of sealing, tightness, and leakage, and are commonly contrasted in technical and safety-related contexts.