NoDictionaries   Text notes for  
... facultatem lenioris in mare iactus. verum Acerronia, imprudentia dum...

lenioris in mare iactus: "iactus" is gen. of a fourth decl. noun modified by "lenioris," "a more gentle toss into the sea." As with "iactus," many 4th decl. nouns are formed from the fourth principle part (ppp) of verbs, especially verbs denoting action.