firstly

The word 'firstly' is a transparent formation from the adjective 'first' with the adverbial suffix '-ly'. 'First' itself has a deep Germanic lineage, deriving from the Old English superlative form 'fyrst', which is related to the concept of being 'foremost' in position or time. The addition of '-ly', a common Germanic adverbial suffix, systematically converts the adjective into an adverb, specifying that an action or statement is being presented in the primary position. Thus, 'firstly' literally means 'in the first manner or place', a logical construction used to enumerate points in discourse.

Structure: first (foremost) + ly (adverb suffix) - first: From Old English 'fyrst', meaning 'foremost, earliest in time or order'. Its ultimate origin is Proto-Germanic. - ly: A suffix from Old English '-lice', used to form adverbs from adjectives, indicating 'in a manner of'.