Frequency: The word is one of the 3000 most common words in English.
1.
Intense is used to describe something that is very great or extreme in strength or degree.
He was sweating from the ~ heat...
His threats become more ~, agitated, and frequent.
ADJ
~ly
The fast-food business is ~ly competitive.
ADV
intensity (intensities)
The attack was anticipated but its intensity came as a shock.
N-VAR: usu with poss
2.
If you describe an activity as ~, you mean that it is very serious and concentrated, and often involves doing a great deal in a short time.
The battle for third place was ~...
ADJ
3.
If you describe the way someone looks at you as ~, you mean that they look at you very directly and seem to know what you are thinking or feeling.
I felt so self-conscious under Luke’s mother’s ~ gaze...
= piercing
ADJ
~ly
He sipped his drink, staring ~ly at me.
ADV: ADV with v
4.
If you describe a person as ~, you mean that they appear to concentrate very hard on everything that they do, and they feel and show their emotions in a very extreme way.
I know he’s an ~ player, but he does enjoy what he’s doing...
ADJ
intensity
His intensity and the ferocity of his feelings alarmed me.
N-UNCOUNT