verb

ascertain

to ascertain, to find out, to determine

The police tried to ascertain the cause of the fire.

The police tried to ascertain the cause of the fire.

Can you ascertain if he is coming to the meeting?

Can you ascertain if he is coming to the meeting?

((sth.)) to find (sth.) out for certain The police tried to ascertain the cause of the fire.

((if/whether-clause)) to find out for certain (if/whether...) Can you ascertain if he is coming?

Synonyms: determine, discover, find out, verify

From Old French 'acertainer' (to make sure), from 'a-' (to) + 'certain' (sure, certain). Literally, 'to make certain'.

Think of making something 'as certain' as possible.

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