Frombleak +-en.
bleaken (third-person singular simple presentbleakens,present participlebleakening,simple past and past participlebleakened)
- (intransitive) To becomebleak
1997, Murray Cox, Alice Theilgaard,Mutative Metaphors in Psychotherapy: The Aeolian Mode, page133:The imagination tends tobleaken in adult life, and rigid categories may reduce perceptual sensitivity. The sense of wonder is diminished and gratitude for experience itself may fail.
2003, Haven Kimmel,The Solace of Leaving Early, page17:The fact of the phrase caused the sky tobleaken and his skin to itch, and by Monday night, when he was unable to sleep, Amos despised his own sensibilities and also despised the world.
