Unhealthiness. Obsolete. rare.

Unhealthy character (of locality, climate, air, etc.); insalubrity, unhealthfulness.

The state or quality of being contagious (in the different senses of the word). literal.

Evil influence, hurtful character, noxiousness. Obsolete.

More generally: noxiousness, deleteriousness. Obsolete.

Unhealthiness. Of places, climate, etc.

Distempered state.

unhealthiness; unwholesomeness.

Unwholesomeness.

Unhealthy character (of locality, climate, etc.); †formerly, unwholesomeness (of food).

The quality or condition of being unhealthy. Of places, climate, etc.

(un-, prefix1 affix 1.)

Malign or baleful character; unpropitiousness; great injuriousness. Obsolete.

Evil influence.

insanitary condition.

Want of sanitation; insanitary condition; absence of sanitary measures or requirements.