/ɪnˈkwɪzɪtər/
in·quisi·tor
BrE /ɪnˈkwɪzɪtə(r)/
NAmE /ɪnˈkwɪzɪtər/
a person who asks a lot of difficult questions, especially in a way that makes you feel threatened
an officer of the Inquisition of the Roman Catholic Church
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in·quisi·tor·ial
BrE /ɪnˌkwɪzəˈtɔːriəl/
NAmE /ɪnˌkwɪzəˈtɔːriəl/
He questioned her in a cold inquisitorial voice.