intensive

Done with intensity or to a great degree; thorough.

Involving much activity in a short period of time; highly concentrated.

Chiefly suffixed to a noun: using something with intensity; requiring a great amount of something; demanding.

Chiefly in intensive care: of care or treatment: involving a great degree of life support, monitoring, and other forms of effort in order to manage life-threatening conditions.

Of agriculture: increasing the productivity of an area of land.

Making something more intense; intensifying.

Of a word: serving to give emphasis or force.

Being made more intense.

Of or pertaining to innate or internal intensity or strength rather than outward extent.

(no longer used) Synonym of intense (“extreme or very high or strong in degree; of feelings, thoughts, etc.: strongly focused”).

(no longer used) That can be intensified; allowing an increase of degree.

A course taught intensively, involving much activity in a short period of time.

A thing which makes something more intense; specifically (linguistics), a form of a word with a more forceful or stronger sense than the root on which it is built.