streaken

From streak +‎ -en.

streaken (third-person singular simple present streakens, present participle streakening, simple past and past participle streakened)

1. (transitive, intransitive) To mark or become marked with streaks
   • 2013, Anthony Ryan, Candle and Sun, page 123:

     Cullan stopped in his tracks...a double-decker bus made a large angular shadow against the now silver streakening cloudscape, incongruous in this reeded sandscape, like a boat in a desert.

• Kaestner