Home/Rootonym/Stealthily treacherous or deceitful; intended to entrap or beguile (adjective)

Stealthily treacherous or deceitful; intended to entrap or beguile (adjective)

MEMaya EllisonPuzzle Editor · Verified answers

USA Today Rootonym clue · 9 letters · last seen June 14, 2026

Answer
INSIDIOUS
INSIDIOUS · 9 letters · puzzle shows **SID****
The Root
SIDmeans “sit, settle”

In a sentence: James insists that heroin is such an addictive and INSIDIOUS drug that it destroys lives.

About this clue

The Rootonym clue “Stealthily treacherous or deceitful; intended to entrap or beguile (adjective)” has the answer INSIDIOUS (9 letters), built on the root SID, which means “sit, settle”. See the full June 14, 2026 Rootonym puzzle for the other three words, or browse all Rootonym answers.