انفجت doesn't appear in Hans Wehr's Modern Standard Arabic dictionary, but Lane's Arabic-English Lexicon has an entry for it. Select the entry below for the full classical Arabic definition.

• انفجّت Form 7

  7 انفجّت القَوْسُ ذ , (A,) inf. n. اِنْفِجَاجٌ, (O,) The bow had its string distant from its كَبِد [q. v.]; (A, O;) [and so, app., , for] , in a bow, signifies the state of having the string distant from the كَبِد thereo…

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