Questioning

google

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late Middle English: from Old French question (noun), questionner (verb), from Latin quaestio(n- ), from quaerere ‘ask, seek’.

wiktionary

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question +‎  -ing

etymonline

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questioning (n.)

"the act of interrogating," c. 1600, verbal noun from question (v.). Questioning pitch for "rising intonation of an interrogative sentence" is by 1906.