(v)build up, work up, build, progressform or accumulate steadily“Resistance to the manager's plan built up quickly”, “Pressure is building up at the Indian-Pakistani border”
(v)arm, build up, fortify, girdprepare oneself for a military confrontation“The U.S. is girding for a conflict in the Middle East”, “troops are building up on the Iraqi border”
(v)build up, developchange the use of and make available or usable“develop land”, “The country developed its natural resources”, “The remote areas of the country were gradually built up”