Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
in-sĕcābĭlis, e, adj., that cannot be cut up or divided, inseparable, indivisible (post-Aug.), Sen. Ep. 118: corpora, i. e. atoms, Quint. 2, 17, 38; 3, 3, 13.