Meaning of “intense” - Learner’s Dictionary

intense

adjective uk us /ɪnˈtens/
EXTREME

extreme or very strong:

intense heat/pain
SERIOUS

Intense people are very serious, and usually have strong emotions or opinions:

He's always been very intense.
intensely adverb

Clare disliked him intensely.
intensity noun [ U ]

(Definition of “intense” from the Cambridge Learner’s Dictionary © Cambridge University Press)