IPA: /ˈtruːθfəl/
KK: /ˈtruːθfəl/
Always saying what is true and not lying; being honest.
She is known for her truthful nature and always speaks her mind.
Comparative: more truthful
Superlative: most truthful
Truthful → It is formed from "truth" (from Old English *triewð*, meaning fidelity or faithfulness) and "-ful" (meaning full of). The word "truthful" means full of truth or characterized by truth.
Think of 'truth' as fidelity or faithfulness, and remember that 'truthful' means being full of truth.