Words, created by people, are much like their creators: One never knows how they’ll morph or where they’ll end up. For example, “monsoon” comes from Dutch monssoen, from Portuguese monçao, from Arabic mawsim “time of year, appropriate season” (for a voyage, pilgrimage, - but not for shopping), according to etymonline. Keep a folding umbrella in your bag at all times just in case, Kumamon says. And check JMA before you go out. http://www.jma.go.jp/jma/index.html - William