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Từ điển Oxford Learners Wordfinder Dictionary
ascertain
1. establish after a calculation, investigation, experiment, survey, or study (Freq. 4)
- find the product of two numbers
- The physicist who found the elusive particle won the Nobel Prize
• Syn:
determine, find, find out
• Derivationally related forms:
ascertainable, find (for: find), finding (for: find), determination (for: determine)
• Hyponyms:
gauge, translate, rectify, redetermine, sequence,
refract, count, number, enumerate, numerate, admeasure,
situate, locate
• Verb Group:
determine, check, find out, see, watch,
learn, discover, find
• Verb Frames:
- Somebody ----s something
- Somebody ----s whether INFINITIVE
2. be careful or certain to do something;
make certain of something (Freq. 1)
- He verified that the valves were closed
- See that the curtains are closed
- control the quality of the product
• Syn:
see, check, insure, see to it, ensure,
control, assure
• Derivationally related forms:
check (for: check)
• Hypernyms:
verify
• Hyponyms:
proofread, proof, control, double-check, cross-check,
cinch, card, spot-check, cover
• Verb Group:
determine, check, find out, see, watch,
learn, check off, mark, mark off, tick off, tick,
control, verify
• Verb Frames:
- Somebody ----s that CLAUSE
- Somebody ----s to INFINITIVE (for: see)
3. find out, learn, or determine with certainty, usually by making an inquiry or other effort
- I want to see whether she speaks French
- See whether it works
- find out if he speaks Russian
- Check whether the train leaves on time
• Syn:
determine, check, find out, see, watch, learn
• Derivationally related forms:
ascertainable, check (for: check), determination (for: determine)
• Hyponyms:
test
• Verb Group:
see, check, insure, see to it, ensure,
control, assure, determine, find, find out
• Verb Frames:
- Somebody ----s whether INFINITIVE
- They ascertain whether there was a traffic accident
4. learn or discover with certainty
• Derivationally related forms:
ascertainable
• Hypernyms:
learn, hear, get word, get wind, pick up,
find out, get a line, discover, see
• Hyponyms:
price
• Verb Frames:
- Somebody ----s that CLAUSE
- They ascertain that there was a traffic accident
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