"unhealthier" in the adjective sense
1. unhealthy
not in or exhibiting good health in body or mind
"unhealthy ulcers"
2. insalubrious, unhealthful, unhealthy
detrimental to health
3. unhealthy
not conducive to good health
"an unhealthy diet of fast foods"
"an unhealthy climate"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License