work up

verb

1. 1

   develop

   we worked up an as of an appetite

2. 2

   come up with

   His colleagues worked out his interesting idea

   We worked up an ad for our client

3. 3

   form or accumulate steadily

   Resistance to the manager's plan built up quickly

   Pressure is building up at the Indian-Pakistani border

4. 4

   bolster or strengthen

   We worked up courage

   build up confidence