overachieve

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o·ver·a·chieve / ˌōvərəˈchēv/ • v. [intr.] do better than is expected, esp. in academic work: David continued to overachieve all through high school. ∎  be excessively dedicated to the achievement of success in one's work.DERIVATIVES: o·ver·a·chieve·ment n.o·ver·a·chiev·er n.