intensive

adj

1. Done with intensity or to a great degree; thorough.

   “Secondly, I continue to base my concepts on intensive study of a limited suite of collections, rather than superficial study of every packet that comes to hand.”

2. Being made more intense.
3. Making something more intense; intensifying.
4. Making something more intense; intensifying.

   “an intensive verb or preposition”

   “Ariſtophanes deriueth it [the word asp] from Alpha, an intenſiue Particle, and Spizo vvhich ſignifieth to extend; either by reaſon of his ſharpe-ſhrill hiſſing, or for the length of his body.”

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

   “I took a three-day intensive course in finance.”

6. Of or pertaining to innate or internal intensity or strength rather than outward extent.
7. Chiefly suffixed to a noun: using something with intensity; requiring a great amount of something; demanding.

   “This job is difficult because it is so labour-intensive.”

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

   “She was moved to the intensive-care unit of the hospital.”

9. (obsolete)That can be intensified; allowing an increase of degree.

   “As his [God's] Perfection is infinitely greater than the perfection of a Man, ſo it is infinitely greater than the perfection of an Angel; and vvere it not infinitely greater than the perfection of an Angel, it could not be infinitely greater than the perfection of a Man, becauſe the intenſive diſtance betvveen the perfection of an Angel and of a Man is but finite: […]”

10. (obsolete)Synonym of intense (“extreme or very high or strong in degree; of feelings, thoughts, etc.: strongly focused”).

    “Faſcination is the povver and act of Imagination, intenſiue vpon other bodies, than the bodie of the Imaginant; […]”

    “The queſtion is in vvhat part of this Serpent the poyſon doth lye; Some ſay in the head alone, and that therefore the Bazeliske is deafe, bycauſe the Ayre vvhich ſerueth the Organe of hearing, is reſolued by the intenſiue calidity: but this ſeemeth not to bee true, […]”

    “[T]he Imagination invvardly or outvvardly moued, repreſents to the vnderſtanding, not intiſements only to favour the paſſion or diſlike, but a very intenſiue pleaſure follovves the paſſion, or diſpleaſure, and the vvill and reaſon are captivated by delighting in it.”

    “Some therefore vvere of opinion, that […] vvith that aſſiduous attendance, and intenſive circumſpection vvhich a long indulgent fortune did require, he vvas grovvn not unvvilling, for his ovvn eaſe, to beſtovv handſomly upon another ſome part of the pains, and perhaps of the envie.”

noun

1. 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.
2. A course taught intensively, involving much activity in a short period of time.

   “Beginning in 2014, ETSI [the Emory-Tibet Science Initiative] embarked on a six-year implementation phase at three monastic universities (Sera, Ganden, and Drepung). This program is composed of summer intensives taught by faculty from Emory and other institutions, year-round study led by on-site instructors, translation and production of bilingual textbooks and instructional videos, and further curriculum refinement.”