# guileful

> English word · Adjective

## Definitions
1. Full of guile; treacherously deceptive.

## Etymology
From Middle English gileful, gilful, equivalent to guile + -ful.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/guileful