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90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.
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Police are trying to ascertain the facts of the case.
We need to ascertain whether the project is feasible.
This much could easily be ascertained from the newspapers.
Experts were unable to ascertain the cause of the accident.
The police have ascertained that he knew the victim.
This is the American English definition of ascertain. View British English definition of ascertain.
a plant whose leaves are used in cooking. Marjoram is a herb.