[v] enlarge or increase; "build up excitement"
[v] grow or intensify; "Pressure is building up at the Indian-Pakistani border"
[v] form steadily; "Resistance to the manager's plan built up quickly"
[v] increase or strengthen gradually; "This investment is building interest"; "We worked up courage"
[v] prepare oneselg for a military confrontation; "The U.S. is girding for a conflict in the Middle East"