When Something Is Unsanitary?

Something that is unsanitary is dirty and unhealthy, so that you may catch a disease from it.

What does it mean to be unsanitary?

: unclean enough to endanger health : not sanitary unsanitary conditions unsanitary habits/practices.

Is the word insanitary or unsanitary?

The adjectives insanitary and unsanitary both refer to dirty, unhealthy conditions or a lack of sanitary equipment. Unsanitary is the more frequent form in North America, while insanitary reflects British usage.