This is the 852nd most frequent Catalan word.
investigar
To investigate.
The word 'investigar' is used as an infinitive verb in present participle to indicate an action of researching or examining a situation or crime.
Els detectius estan investigant el cas del robatori.
The detectives are investigating the robbery case.
The word 'investigar' here is used in past tense, signifying that the action of researching or examining was completed by Joan.
En Joan va investigar els orígens històrics del poble.
Joan investigated the historical origins of the village.
The word 'investigar' is used in an infinitive form following an auxiliary verb 'hem d’' (we have to), indicating necessity and intent to perform the action of investigating.