overdeliver means to deliver in excess of a norm, standard, or requirement. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
Etymology
From over- + deliver.
verb
- To deliver in excess of a norm, standard, or requirement.““He’s wise not to overpromise, but to underpromise and overdeliver,” said Dave Checketts, a former president of the Knicks and then Madison Square Garden who left in 2001 after a power struggle with James L. Dolan, the chairman of the Garden.”