2010 Horror Film, a Young Boy and Patrick Wilson

This page is the CodyCross answer for the clue below from Trip to Spain, Group 852, Puzzle 5 (Islamic Art).

Question is: 2010 Horror Film, a Young Boy and Patrick Wilson

and the answer is: INSIDIOUS

Word Meaning:

INSIDIOUS — Causing harm in a stealthy, often gradual, manner.

Definitions from Wiktionary.