dimmen

verb

1. (intransitive, rare)To become less bright; to dim.

   “BTW, if you are planning to tape, i would be careful. The security is being very tight. They are checking the sweet spot in the middle carefully, people in Buffalo got booted even before the lights dimmened. I think everyone in Rochester got nailed.”

   “On sunnier days—the air was steadily dimmening as the autumn progressed—Stephanie would take down an enormous iron key, big and heavy enough to bludgeon to death Professor Plum in the parlour, from the last hook on the coat-rack behind the front door, and we would cross the road and open the ancient little gate, so rickety it seemed held together only by immemorial layers of glittering knobbly black paint.”