Venturesome comes from 'venture' + '-some'. 'Venture' is an aphetic form of 'adventure', from Old French 'aventure', from Latin 'adventura' ('about to happen'), from 'advenire' ('to arrive'). The historical chain includes Latin adventura and Latin advenire. The quoted older senses, "venture", "-some", "Venture", "adventure", and "aventure", supply the semantic anchors for venturesome. The formation is best read as borrowed: the word venturesome carries its older form-history into a compact English lexical shape. In present English it is used as a adj, "willing to take risks; daring and adventurous". English derivatives include venturesomeness; related English forms include venture, adventure, and venturous. The result is a adj whose etymology preserves both the older form and the later English specialization.