níž

In a sentence

• Údolí, v němž stojí vesnice, je obklopeno lesy.

  The valley, in which the village stands, is surrounded by forests.

  Here, 'níž' functions as a relative pronoun replacing a previously mentioned location, modifying the description of where the action takes place.

• Kniha, o níž diskutujeme, je velmi zajímavá.

  The book, about which we are discussing, is very interesting.

  Here, 'níž' expresses a means of referring to the topic of the discussion in a relative clause, linking the antecedent with the ensuing relative clause.

• Pokoje, v nichž jsme bydleli, byly útulné.

  The rooms, in which we stayed, were cozy.

  In this example, 'níž' conveys the spatial relationship of the subject in a relative clause, detailing the specific association between the subject and the predicate.