noc·u·ous 
(nŏky-əs)
(nŏky-əs)adj.
Harmful; noxious.
[From Latin nocuus, from nocēre, to harm; see nek-1 in the Appendix of Indo-European roots.]
nocu·ous·ly adv.
- cogent
- cogently
- cogged
- cogitable
- cogitate
- cogitation
- cogitative
- cogitatively
- cogitator
- cognac
- Cognac
- cognate
- cognation
- cognition
- cognitional
- cognitive
- cognitive-behavioral therapy
- cognitive dissonance
- cognitively
- cognitive neuroscience
- cognitive science
- cognitive therapy
- cognizable
- cognizably
- cognizance