This is the 493rd most frequent Croatian word.
njegovo
"Njegovo" means "his" in English.
Here, 'njegovo' is a possessive adjective meaning 'his,' referring to ownership of the noun 'mišljenje' (opinion).
Njegovo mišljenje je vrlo važno.
His opinion is very important.
In this sentence, 'njegovo' is a possessive adjective indicating 'his,' describing the face that is being referred to.
Svijetlo je odražavalo njegovo lice.
The light reflected his face.
This usage of 'njegovo' is also as a possessive adjective, denoting 'his,' connected to 'razumijevanje' (understanding).