twelvemonth

noun

Etymology: From Middle English twelmonth, twelfmonthe, twelfmonþe, from Old English twelfmōnþ, twelfmōnaþ, equivalent to twelve + month.

1. A year.

   “But last February, almost a twelvemonth back, she suddenly disappeared.”

   “Take the annals of the majority of hearths for a twelvemonth, and we should be amazed at the quantity of wretchedness that would be writ in them, if writ truly.”