1 (of a quality etc.) existing in a high degree; violent; forceful (intense cold).
2 (of a person) feeling, or apt to feel, strong emotion (very intense about her music).
3 (of a feeling or action etc.) extreme (intense joy; intense thought).
Derivatives:
intensely adv. intenseness n.
Etymology: ME f. OF intens or L intensus (as INTEND)
Useful english dictionary. 2012.