ἢ λέγε τι σιγῆς κρεῖττον ἢ σιγὴν ἔχε → either say something better than silence or keep silence (Menander)
in-sessus: a, um, adj. 2. in-sedeo,
I unsettled, without a permanent dwelling: gentes, Sic. Fl. de Cond. Agr. p. 3.
insessus: a, um, Part., from insideo.