insidious
in-sid-i-ous
adjective
Proceeding subtly and gradually, but with harmful or destructive effects.
"The insidious disease spread unnoticed for years."
Thesaurus
Synonyms: dangerous, unsafe, harmful, pernicious, subtle, seductive
in-sid-i-ous
Proceeding subtly and gradually, but with harmful or destructive effects.
"The insidious disease spread unnoticed for years."
Synonyms: dangerous, unsafe, harmful, pernicious, subtle, seductive