SAT guileless Definition Honest and sincere, without deceit or cunning. Example "His guileless smile made everyone trust him immediately." Sign in to save SAT Quiz → ← guile guillotine → Study tips featuring "guileless" Let the Argument Reveal Unfamiliar Word Meanings Map the Author's Attitude Before Reading Questions Stop Skipping Words and Read the Tone Related words SAT antonym SAT abase SAT abdicate SAT abdomen SAT abduction SAT abet SAT abeyance SAT abject SAT abjure SAT ablution SAT abnegate SAT abnormal