Monthlong

Part of speech: adjective

Definitions

1. lasting for the entirety of one month
2. occurring continuously throughout a full month's duration
3. Continuing without interruption for the full span of a month

Etymology: "Monthlong" is a plain compound of "month" and "long", with no hidden story behind it. Its first part, "month", comes from Old English "mōnaþ", which goes back to a Germanic word that was tied to the moon, since a month was measured by its cycle. The second part, "long", is an ancient word for length in time as well as distance, descending from Old English "lang". Joining them gives an adjective meaning that something lasts the whole span of a month.

Synonyms: monthly, 30-day