build up -
change 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"
increase make bigger or more; "The boss finally increased her salary"; "The university increased the number of students it admitted"
build up -
prepare 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"