Updated on March 16, 2024
| major | The major source of pollution is heavy industry. |
| important | The library is an important source of information. |
| main | The main source of water for the city is the reservoir. |
| only | The only source of heat in the room was the fireplace. |
| primary | The primary source for this information is a book written by the author. |
| light | The flashlight was the only light source in the dark room. |
| single | The single source of all knowledge is experience. |
| common | This is a common source of errors in many fields. |
| principal | The principal source of energy for the Earth is the sun. |
| chief | |
| potential | This is a potential source of information. |
| constant | The constant source of water from the well kept the crops alive during the drought. |
| original | The original source of the data is a mystery. |
| possible | The possible source of the problem is a faulty connection. |
| sole | This procurement is a sole source contract. |
| best | The library is the best source of information for students. |
| rich | The library is a rich source of knowledge. |
| ultimate | The ultimate source of water in the oceans is rainfall. |
| current | The current source provided a constant current to the circuit. |
| external | "The external source was a major contributor to the project's success." |
| valuable | The old interview with the scientist was a valuable source for the journalist. |
| reliable | Refer to reliable source before making a decision. |
| excellent | This book is an excellent source of information on the subject. |
| significant | "Degradation of the environment is a significant source of mental health problems," said Dr. Aaron Bernstein, a pediatrician and environmental health researcher at Harvard Medical School. |
| additional | The additional source provided valuable information for the research paper. |
| open | The open source software is freely available for anyone to use, modify, and distribute. |
| true | The true source of the problem is often difficult to identify. |
| largest | The largest source of income for the company is from sales. |
| fruitful | His presentations serve as a fruitful source of information for the students. |
| third | He consulted a third source to cross-check his facts. |
| useful | The report uses the data from the survey as a useful source of information. |
| sound | The sound source of the music is coming from the next room. |
| alternative | We must look for alternative sources of energy. |
| greatest | The greatest source of knowledge is experience. |
| prime | The prime source of the dysfunction was a congenital heart defect. |
| likely | The local river is the likely source of the pollution. |
| outside | I consulted an outside source to confirm the information. |
| independent | |
| secondary | The secondary source provided additional context for the historical event. |
| immediate | The immediate source of the data is not specified. |
| available | The available source provides detailed information. |
| inexhaustible | The knowledge contained in the library was an inexhaustible source of inspiration for his writing. |
| divine | "Divine source" provided a solution. |
| obvious | |
| frequent | The frequent source of information was the internet. |
| ray | The ray source was from the sun, but the ray detector was on the Earth. |
| authoritative | You should always refer to an authoritative source before making any important decisions. |
| invaluable | This book is an invaluable source of information. |
| powerful | The sun is a powerful source of energy. |
| fertile | The book is a fertile source of information about the history of the city. |
| convenient | This convenient source offers a wealth of helpful information. |
| unknown | The letter was sent from an unknown source |
| dominant | The dominant source of energy for the Earth is the sun. |
| probable | The probable source of the infection is in the digestive system. |
| prolific | The prolific source of the river provided ample water for the surrounding communities. |
| ideal | The ideal source of energy for a human would be one that is easily digestible, provides a lot of energy, and does not produce waste products. |
| vital | The book is a vital source of information for students. |
| continuous | The continuous source of laughter made everyone in the class burst into fits of giggles. |
| ready | The internet is a ready source of information. |
| potent | The potent source of light illuminated the dark room. |
| unexpected | She received an unexpected source of encouragement. |
| abundant | The internet has become an abundant source of information. |
| steady | A steady source of income is essential for financial security. |
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