Blacken a bit is a term used to describe the process of darkening or charring an item. The crossword solutions for this term are CHAR (4 letters), SINGE (5 letters), and SEAR (4 letters). Charring is the process of burning something until it is blackened, singeing is the process of lightly burning something, and searing is the process of quickly cooking something at a high temperature. All three processes can be used to blacken a bit.