noxious
Concise Oxford English Dictionary © 2008 Oxford University Press:
noxious /ˈnɒkʃəs/
▶adjective harmful, poisonous, or very unpleasant.
– derivatives
noxiously adverb,
noxiousness noun.
noxiously adverb,
noxiousness noun.
'noxious' also found in these Oxford entries:

