ismerniük
Ismerniük is a Hungarian non-finite verb form built from the infinitive ismerni (to know) with the third-person plural possessive suffix -ük, producing a so-called possessive infinitive. In standard dictionaries, ismerniük is not treated as a separate lexical entry but is described as a specific inflected non-finite form used in particular grammatical constructions.
The form signals that the action of the infinitive is associated with a plural third-person subject (they).
Scholarly descriptions of Hungarian phonology and syntax note the existence of possessive infinitives as a developmental
Hungarian grammar, infinitive forms, possessive suffixes, non-finite verb forms.