ascertain

Từ điển American Heritage Dictionary 4th

as·cer·tain (ăs'ər-tānʹ)tr.v. as·cer·tained, as·cer·tain·ing, as·cer·tains
1. To discover with certainty, as through examination or experimentation. See Synonyms at discover.
2. Archaic. To make certain, definite, and precise. [Middle English acertainen, to inform, from Old French acertener, ascertain- : a-, to (from Latin ad-. See ad-) + certain, certain; see certain.] as'cer·tainʹa·ble adj.as'cer·tainʹa·ble·ness n.as'cer·tainʹa·bly adv.as'cer·tainʹment n.

• Từ đồng nghĩa / Synonyms:
  determine, check, find out, see, watch, learn, insure, see to it, ensure, control, assure, find