Word Study
insider trading |
insides |
insidiate |
insidiator |
insidious |
insidiously
| insidiousness
| insight
| insightful
| insightfulness
| insignia
insidiously
WORDNET DICTIONARY
Adverbial insidiously has 1 sense
- insidiously(r = adv.all) perniciously - in a harmfully insidious manner; "these drugs act insidiously"
For further exploring for "insidiously" in Webster Dictionary Online