ascertain

Meaning

Verb

To find out definitely; to discover or establish.
To make (someone) certain or confident about something; to inform.
To establish, to prove.
To ensure or effect.

Origin

From Middle English acerteynen, from Old French acertener, from a- + certener, from the adjective certain, from Latin certus ("certain, fixed"). Compare to Spanish acertar.

Modern English dictionary

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