This is the 314th most frequent Czech word.
němž
The Czech word "němž" means "in which" or "on which," used as a relative pronoun in formal contexts.
This is a relative pronoun referring to 'o muži', connecting the clause with information about him in a formal manner.
Tento příběh je o muži, o němž jsme slyšeli tolik zajímavých věcí.
This story is about a man, about whom we have heard so many interesting things.
Here, 'na němž' relates to 'Film' and indicates the action of watching, linking it to the movie.
Film, na němž jsme se minulý týden dívali, byl velmi poutavý.
The movie, which we watched last week, was very engaging.
In this example, 'pod nímž' refers to 'Most' and introduces the idea of the location in relation to the river.