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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Leviticus 10:17 מַדּ֗וּעַ ma.Du.a' · Small word: why
Wherefore have ye not eaten the sin-offering in the place of the sanctuary, seeing it is most holy, and he hath given it you to bear the iniquity of the congregation, to make atonement for them before Jehovah?
American Standard Version (1901). Public domain.