ascertain

(v) establish after a calculation, investigation, experiment, survey, or study
- find the product of two numbers
- The physicist who found the elusive particle won the Nobel Prize
determine, find out, find,
(v) be careful or certain to do something; make certain of something
- He verified that the valves were closed
- See that the curtains are closed
- control the quality of the product
insure, see to it, ensure, check, assure, control, see,
(v) 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
find out, learn, watch, determine, see, check,
(v) learn or discover with certainty

determine find out find insure see to it ensure check assure control see learn watch

ascertainable ascertained