unhealthiness
From LSJ
λίγεια μινύρεται θαμίζουσα μάλιστ' ἀηδών → the sweet-voiced nightingale mourns constantly, the sweet-voiced nightingale most loves to warble
English > Greek (Woodhouse)
substantive
sickness: P. and V. νόσος, ἡ; see sickness.
insalubriousness: use P. and V. τὸ νοσῶδες.