ADJ
- excellent, fertile, good, lucrative, reliable, rich, valuable
- a fertile source of ideas a lucrative source of income a rich source of vitamins
- important, main, major, principal
- cheap
- a cheap source of labour
- external, foreign
- Do you have any foreign sources of income?
- independent
- an independent source of funding
- additional
- alternative
- We need to look for alternative sources of energy
- natural
- renewable
- The village obtains all its energy from renewable sources
- energy, food, heat, light, power, water
VERB + SOURCE
- be, constitute, prove, provide
- The census constitutes the principal source of official statistics. These crustaceans provide a valuable food source for some fish
- exploit, tap, use (as)
- The government hopes to tap new sources of employment in the area of health
- locate
- We tried to locate the source of the sound
PREP
- at ~
- Under the PAYE system, employees' income is taxed at source (= by the employer)
- ~ of
- a reliable source of advice
PHRASES
- a variety of sources
- The research was funded from a wide variety of sources
ADJ
- invaluable, useful, valuable
- authoritative, informed, reliable, reputable
- unreliable
- original
- independent
- anonymous
- primary, secondary
- published
- biographical, documentary, historical, literary, written
- diplomatic, government, intelligence, military, official, police
- Intelligence sources report a build-up of troops just inside the border
- data, information
VERB + SOURCE
- use (as)
- cite, quote
- Researchers try to quote primary sources wherever possible
- disclose, name, reveal
- The police refused to reveal the source of their information
SOURCE + VERB
- claim sth, describe sth, disclose sth, indicate sth, report sth, reveal sth, say sth, suggest sth
- Government sources indicated that a compromise might be reached. One source said: 'Our blood is up. We are angry at the way we have been treated.'
- deny sth
PREP
- according to ~s
- According to informed sources, a takeover bid is planned for next month
- ~ of
PHRASES
- sources close to sb
- Sources close to the player claim he won't be entering this year's championship