In a manner that is honest, sincere, and open about one's true feelings or thoughts.
Formed from 'frankhearted' with the adverbial suffix '-ly,' which converts adjectives into adverbs describing how an action is performed. This follows standard English word formation patterns from the 17th century onward.
English loves stacking suffixes—'frank' + 'heart' + 'ed' + 'ly' creates a four-layer word that means simply 'honestly!' Other languages often use single words where English chains multiple parts together.
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