1. to exert effort in order to do, make, or perform something; - Example: "the child worked at the multiplication table until she had it down cold" [syn: work at, work on]
WordNet (r) 3.0 (2006):
work at
v 1: to exert effort in order to do, make, or perform something;
"the child worked at the multiplication table until she had
it down cold" [syn: work at, work on]