Definify.com
Webster 1913 Edition
Infestuous
In-fes′tu-ous
(?; 135)
, Adj.
 Mischievous; harmful; dangerous. 
[Obs.] 
“Infestuous as serpents.” Bacon.
 Webster 1828 Edition
Infestuous
INFEST'UOUS
,Adj.
 Definition 2025
infestuous
infestuous
English
Adjective
infestuous (comparative more infestuous, superlative most infestuous)
-  (obsolete) mischievous; harmful; dangerous
- Infestuous as serpents. — Bacon.