foredawn means the time before dawn. Lexicurio rates it Sui generis — a strength score of 91 out of 100.
Etymology
From fore- + dawn.
noun
- The time before dawn.“I opened the front door and went out into the foredawn, into the hissing of the silence and the humming of the underground trains standing empty with lighted windows on the far side of the common.”
verb
- To anticipate dawning or emerging.“I see in it a wonderful fulfillment of things and plans which have been foredawned in my mind, many years ago;”