build up

verbs

enlarge, develop, or increase by degrees or in stages
"build up your savings"
is derived from
is a type of (narrower)
make bigger or more
"The boss finally increased her salary"; "The university increased the number of students it admitted"
form or accumulate steadily
"Resistance to the manager's plan built up quickly"; "Pressure is building up at the Indian-Pakistani border"
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"
bolster or strengthen
"We worked up courage"; "build up confidence"; "ramp up security in the airports"
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"