intensive
adjective OPAL W
  /ɪnˈtensɪv/
  /ɪnˈtensɪv/
- involving a lot of work or activity done in a short time
- an intensive language course
 - two weeks of intensive training
 - intensive diplomatic negotiations
 - highly intensive courses for business and professional people
 
Which Word? intense / intensiveintense / intensiveBoth these words can describe something that involves a lot of action in a short period of time.Topics Working lifec1- intense can often suggest somebody's feelings about the thing being described:
- The course was really intense—I found it difficult to wind down at the end of each day.
 
 - intensive is a more objective description:
- The five-day intensive course runs from 24 to 28 July.
 
 
Oxford Collocations Dictionaryverbs- be
 
- highly
 - very
 - increasingly
 - …
 
 - complete and extremely detailed; done with a lot of care
- His disappearance has been the subject of intensive investigation.
 
Oxford Collocations Dictionaryverbs- be
 
- highly
 - very
 - increasingly
 - …
 
 - (of methods of farming) aimed at producing as much food as possible using as little land or as little money as possible
- Traditionally reared animals grow more slowly than those reared under intensive farming conditions.
 - intensive agriculture
 
Oxford Collocations Dictionaryverbs- be
 
- highly
 - very
 - increasingly
 - …
 
 see also capital-intensive, labour-intensive 
Word Originlate Middle English (in the sense ‘vehement, intense’): from French intensif, -ive or medieval Latin intensivus, from intendere ‘intend, extend, direct’, from in- ‘towards’ + tendere ‘stretch, tend’.