Tra từ extend - Từ điển Oxford Advanced Learner 8th

ex·tend [extend extends extended extending] BrE [ɪkˈstend] NAmE [ɪkˈstend] verb

MAKE LONGER/LARGER/WIDER
1. transitive ~ sth to make sth longer or larger
•to extend a fence/road/house
• There are plans to extend the no-smoking area.
2. transitive ~ sth to make sth last longer
•to extend a deadline/visa
• The show has been extended for another six weeks.
• Careful maintenance can extend the life of your car.
3. transitive ~ sth to make a business, an idea, an influence, etc. cover more areas or operate in more places
• The company plans to extend its operations into Europe.
• The school is extending the range of subjects taught.

INCLUDE
4. intransitive + adv./prep. to relate to or include sb/sth
•The offer does not extend to employees' partners.
•His willingness to help did not extend beyond making a few phone calls.

COVER AREA/TIME/DISTANCE
5. intransitive + adv./prep. to cover a particular area, distance or length of time
• Our land extends as far as the river.
• His writing career extended over a period of 40 years.
6. intransitive + adv./prep. to make sth reach sth or stretch
•to extend a rope between two posts

PART OF BODY
7. transitive ~ sth to stretch part of your body, especially an arm or a leg, away from yourself
•He extended his hand to (= offered to shake hands with) the new employee.
• (figurative)to extend the hand of friendship to (= try to have good relations with) another country

OFFER/GIVE
8. transitive (formal)to offer or give sth to sb
•~ sth to sb I'm sure you will join me in extending a very warm welcome to our visitors.
•to extend hospitality to overseas students
•The bank refused to extend credit to them (= to lend them money).
•~ sb sth to extend sb an invitation

USE EFFORT/ABILITY
9. transitive, often passive ~ sb/sth/yourself to make sb/sth use all their effort, abilities, supplies, etc
•Jim didn't really have to extend himself in the exam.
•Hospitals were already fully extended because of the epidemic.
see also ↑extension, ↑extensive
Verb forms:

Word Origin:
late Middle English: from Latin extendere ‘stretch out’, from ex- ‘out’ + tendere ‘stretch’.

Thesaurus:
extend verb
1. T
•We plan to extend the house next year.
enlarge • • expand • • lengthen • • stretch • • widen • • broaden •
extend/enlarge/expand/lengthen/stretch/widen sth to a particular amount
extend/enlarge/expand/lengthen/widen sth by a particular amount
extend/expand/widen/broaden your knowledge
Extend or enlarge? Things that you extend are usually on a larger scale than things that you enlarge: you extend a house or building, but enlarge a picture, or an area within a building.
2. T
•They've agreed to extend the deadline.
prolong • • sustain • • maintain •
Opp: shorten
extend/prolong/sustain/maintain (sb's) life
extend/prolong a visit/stay
extend/prolong/maintain sth indefintiely
Extend or prolong? Extend is used especially in business contexts
•to extend an overdraft/a trip/a visa
Prolong is used more to talk about making experiences last longer
•to prolong your stay/survival/agony

Example Bank:
•The country's power extends far beyond its military capabilities.
•The repayment period will be extended from 20 years to 25 years.
•Careful maintenance can extend the life of your car by several years.
•Each summer we are asked to extend hospitality to overseas students.
•I'm sure you will join me in extending a very warm welcome to our visitors.
•The bank refused to extend credit to them.
•The wood does not extend very far.
•There are plans to extend the road network in the north of the country.
•They extended the invitation to all members of staff.
•They've agreed to extend the deadline.
•We extend our greetings to you and thank you for listening to us.
•We extend our sympathy to the families of the victims.
•We extended a rope between the two posts.
•You can add value to your house by extending or renovating it.