This is the 4512th most frequent Catalan word.
necessitin
"Necessitin" means "they need" in English.
Here, 'necessitin' is used in the subjunctive mood to express a hypothetical necessity for the students wouldn't understand the theory without help.
Els estudiants necessitin ajuda per entendre la teoria.
The students need help to understand the theory.
In this sentence, 'necessitin' is used as part of a conditional expression, indicating a hypothetical situation regarding the need to visit the library.
Si necessitin anar a la biblioteca, poden demanar una autorització.
If they need to go to the library, they can request an authorization.
Here 'necessitin' is used to emphasize the necessity in a dependency clause, governed by the main subject's opinion or advice.