In a farrand manner; in a well-mannered, orderly, or suitable way; archaic adverbial form rarely used in modern English.
From 'farrand' (archaic adjective) plus the adverb-forming suffix '-ly,' following standard English patterns for converting adjectives to adverbs.
This adverb is so rarely used that it appears in perhaps only a handful of preserved texts, making it a ghost word haunting the margins of historical English.
Complete word intelligence in one call. Free tier — 50 lookups/day.