tagu = winter (noun and adjective) (some things Google found for "tagu": a very common term; user names; month in the traditional Burmese or Myanmar calendar (April); a last name; Tagu lizard; means "to choke, to strangle" in Welsh; name of cities in South Korea, Romania, Burma and Papua New Guinea)
Word derivation for "winter"
Basque = negu, Finnish = talvi
Miresua = tagu
My previous word for "winter" was "vilun". As both the Basque word and the Finnish word end in a vowel, I think my Miresua word should too.