ἐνδομυχάω

From LSJ

κρείσσων γὰρ ἦσθα μηκέτ' ὢν ἢ ζῶν τυφλός → thou wert better not alive, than living blind | you were better not alive, than living blind

Source

Spanish (DGE)

mantener oculto ἕτερα μὲν ἐν τῇ καρδίᾳ ἐνδομυχᾷς Cyr.Al.Luc.2.91.24.