1adverb
in a harmfully insidious manner
“these drugs act insidiously”
01 Word definition
insidiously
11 letters · 5 vowels · 6 consonants
Is INSIDIOUSLY a word?
Yes. INSIDIOUSLY is a 11-letter adverb. in a harmfully insidious manner Check the official dictionary for your particular word game before playing it.
Correct spelling
I-N-S-I-D-I-O-U-S-L-YHow do you spell INSIDIOUSLY?
INSIDIOUSLY contains 11 letters, begins with I, and ends with Y.
Check another spelling →Meaning and definition
Synonyms
Source: Open English WordNet 2025 (CC BY 4.0) ↗perniciously
02 Letter breakdown
How is INSIDIOUSLY spelled?
I1N2S3I4D5I6O7U8S9L10Y11
03 Word-game status
Can you play INSIDIOUSLY?
UnscramblerHQ dictionary
This spelling is present in our broad English solver dictionary.
Scrabble
Base tile value: 15 points. Confirm eligibility in the official word list used for your region and edition.
Words With Friends
Base tile value: 17 points. Confirm eligibility inside the current game dictionary.
FAQ Quick answers
About INSIDIOUSLY.
How do you spell INSIDIOUSLY?
INSIDIOUSLY is spelled I-N-S-I-D-I-O-U-S-L-Y. It contains 11 letters.