The Collaborative International Dictionary of English v.0.48:

Adventure \Ad*ven"ture\, v. t. [imp. & p. p. Adventured; p.
   pr. & vb. n. Adventuring.] [OE. aventuren, auntren, F.
   aventurer, fr. aventure. See Adventure, n.]
   1. To risk, or hazard; jeopard; to venture.
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            He would not adventure himself into the theater.
                                                  --Acts xix.
                                                  31.
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   2. To venture upon; to run the risk of; to dare.
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            Yet they adventured to go back.       --Bunyan,
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            Discriminations might be adventured.  --J. Taylor.
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