ascertaining
as-cer-tain-ing
noun (gerund)
The process of finding out or making certain of something.
"Ascertaining the details requires patience."
verb (present participle)
Discovering or confirming information, facts, or the truth precisely.
"They are ascertaining the exact figures."
Thesaurus
Synonyms: ascertain, assure, ensure, control, see, insure, check, see to it, determine, find out, find, learn