monthly

The word 'monthly' is a transparent English compound built from the native Germanic root 'month' and the productive adjectival suffix '-ly'. The root 'month' itself is ancient, deriving from the Proto-Germanic 'mēnōth-', which is directly connected to the word for 'moon', reflecting the early human practice of measuring time by lunar cycles. The suffix '-ly', originating from Old English '-līc' (meaning "body, form, like"), evolved into a standard means of forming adjectives from nouns, indicating periodicity or characteristic. Thus, the literal construction "moon-like" (pertaining to the moon's cycle) evolved into the modern abstract meaning of something occurring or relating to each calendar month.

Structure: month (time period) + ly (adjective/adverb suffix) - month: From Old English 'mōnath', of Germanic origin, related to 'moon'. It functions as the base noun denoting a calendrical unit. - ly: From Old English '-līc', an adjective-forming suffix meaning "having the qualities of" or "occurring every". In this word, it forms an adjective/adverb meaning "pertaining to or occurring in each month".