insidious

/ɪn'sɪdiəs/ adjective
9 letters4 syllables10 points in Scrabble®12 points in WWF®
DEFINITIONS3
ADJECTIVE
1

Working or spreading in a hidden and usually injurious way.

“glaucoma is an insidious disease”

2

Beguiling but harmful.

“insidious pleasures”

3

Intended to entrap.

WORD FORMS
Related forminsidiousness
GAME SCORES
Scrabble®10 points
Words With Friends®12 points
Double word20 points
Triple word30 points
GOOD TO KNOW
Pig Latininsidiousway
Starts & ends withI … S
Syllablesin · sid · i · ous
SYNONYMS & RELATED7
KEEP EXPLORING4
You Go Words!
© 2026 You Go Words! · Independently made since 2014.For educational entertainment only. Scrabble®, Words With Friends® and other game marks belong to their owners.