-
form or accumulate steadily;
"Resistance to the manager's plan built up quickly"
"Pressure is building up at the Indian-Pakistani border"
-
develop;
"we worked up an as of an appetite"
-
bolster or strengthen;
"We worked up courage"
"build up confidence"
"ramp up security in the airports"
-
come up with;
"His colleagues worked out his interesting idea"
"We worked up an ad for our client"