In a confrontational or facing manner; directly and boldly.
From 'front' (from Old French 'front' meaning forehead, face, or to face) + '-ing' (present participle) + '-ly' (adverb marker). This is a rare or archaic formation.
This word is quite rare in modern English, but it shows how productive adverb formation is—you can add '-ly' to many verbs to create adverbs, even if the result isn't commonly used, which is why some words feel 'new' even though they're grammatically valid.
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