Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
in-cŏactus, a, um, adj., not compelled, voluntary (post-Aug. and rare): omne honestum injussum incoactumque est, Sen. Ep. 66 med. (false read. for incohata, Val. Max. 4, 7).