autumnize

• autumnise (non-Oxford British spelling)

autumn +‎ -ize

autumnize (third-person singular simple present autumnizes, present participle autumnizing, simple past and past participle autumnized)

1. (transitive) To prepare (something) for autumn weather.
2. (transitive) To give the appearance of autumn; to make autumnal.
   • 2013, Bonny Wolf, Talking with My Mouth Full: Crab Cakes, Bundt Cakes, and Other Kitchen Stories, page 130:

     I like to set the Thanksgiving table and autumnize the house almost as much as I like to cook the Thanksgiving dinner.

   • 1829, John Leonard Knapp, The Journal of a Naturalist, page 106:

     When first the maple begins to autumnize the grove, the extremities of the boughs alone change their colour, but all the internal and more sheltered parts still retain their verdure.