This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. To discover with certainty, as through examination or experimentation. See Synonyms at discover.

v. Archaic To make certain, definite, and precise.

v. To find out definitely; to discover or establish.

v. To render (a person) certain; to cause to feel certain; to make confident; to assure; to apprise.

v. To make (a thing) certain to the mind; to free from obscurity, doubt, or change; to make sure of; to fix; to determine.

v. To find out or learn for a certainty, by trial, examination, or experiment; to get to know.

To make certain; determine; define or reduce to precision by removing doubt, obscurity, or ambiguity; establish; prove.

To find out by trial, examination, or experiment, so as to know as certain; acquire an accurate knowledge of: as, to ascertain the weight of a commodity or the purity of a metal.

To make sure of; insure.

To make certain or sure; certify; assure; inform.

To establish with certainty; render invariable, or not subject to caprice; fix.

v. find out, learn, or determine with certainty, usually by making an inquiry or other effort

v. establish after a calculation, investigation, experiment, survey, or study

v. be careful or certain to do something; make certain of something

v. learn or discover with certainty

"I was able to ascertain from the News forum that there's at least one Telcel shop in Alamos."

ascertained    ascertaining    ascertains   

test    refract    count    number    enumerate    situate    admeasure    sequence    rectify    gauge   

fix    determine    discover    learn    establish    find out    work out   

Alane    Aquitaine    Ayn    Bahrain    Biscayne    Blaine    Cain    Chain    Champagne    Champaign