Godan verb with 'su' ending, Transitive verb
to ascertain; to confirm; to verify; to make sure of
Usually written using kana alonesee 聞きただすsee ききただす
校長は彼に無断欠勤の理由をただした。
The principal called him to account for being absent without an excuse.
Also written 糾す【ただす】tadasu、正す【ただす】tadasu