This is the 100th most frequent Czech word.
něm
The Czech word "něm" is a form of the pronoun "on" (he/it) used in the locative case, meaning "him" or "it" in contexts involving location or situation.
Here, 'něm' is the prepositional pronoun referring to a male person ('on') used after a preposition 'o'.
Přemýšlel jsem o něm celý den.
I thought about him all day.
In this sentence, 'něm' appears following 'o', which introduces the prepositional object of the clause.
Našel jsem knihu, v níž se píše o něm.
I found a book that writes about him.
'Něm' is used here after the prepositions 'díky', showcasing its function as a personal pronoun in instrumental case after prepositions.