In a bonhomous manner; with good nature and cheerful friendliness.
Formed by adding the adverbial suffix -ly to bonhomous, which itself derives from bonhomie plus -ous. This creates a three-stage French-to-English word transformation.
This word rarely appears anywhere outside of dictionary entries—it's a kind of 'constructed' word that English allows grammatically but doesn't actually use. It shows how English morphology can theoretically create words that speakers never need.
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