糾す

ただす【糺す･糾す】

〔取り調べる〕 investigate; inquire [look] into…; 〔究明する〕 examine; check (on [up on]).

●真偽[実否]をただす inquire into the truth of the matter; ascertain the truth

・元をただす inquire into [trace (up)] the origin; go to the root of a matter; go to the bottom of an affair

・元をただせば originally; in its [their] origin; in the beginning [first place]

・身元をただす inquire into sb's antecedents [background]; check (on [up on]) sb's record [identity, background]

・罪をただす investigate a crime

・金の出所をただす inquire into [check on, investigate] where the money comes from.