in a way that is honest and accurate; telling the truth.
From 'truthful' (truth + -ful) + '-ly' (manner). 'Truth' comes from Old English 'treowth' related to 'troth' (loyalty). The '-ly' suffix transforms adjectives into adverbs describing manner.
The root 'truth' originally meant loyalty or fidelity—you kept faith with someone by telling them the truth—so 'truthfully' literally means 'in a loyal and faithful way,' connecting honesty to relationship bonds!
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