Word meanings
Strong's dictionary
or מַדֻּעַ; from מָה and the passive participle of יָדַע; what (is) known?; i.e. (by implication) (adverbially) why?; how, wherefore, why.
Strong's Exhaustive Concordance (public domain)
Full lexicon entry (Brown-Driver-Briggs)
מַדּוּעַ 61 and מַדֻּעַ adv. wherefore?
Every occurrence
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2 Chronicles 24:6 מַדּ֙וּעַ֙ ma.Du.a' · Small word: why
And the king called for Jehoiada the chief, and said unto him, Why hast thou not required of the Levites to bring in out of Judah and out of Jerusalem the tax of Moses the servant of Jehovah, and of the assembly of Israel, for the tent of the testimony?
American Standard Version (1901). Public domain.