boost 
(bst)
(bst)v. boost·ed, boost·ing, boosts
v.tr.
1. To raise or lift by pushing up from below. See Synonyms at lift.
2.
a. To increase; raise: boost prices; efforts to boost participation in the program.
b. To assist in further development or progress: a bill intended to boost local charities.
3. To stir up enthusiasm for; promote vigorously: boosted their school with rallies and fund drives.
4. Electricity To increase the voltage of (a circuit).
5. Slang To steal or rob, especially by shoplifting or pickpocketing.
v.intr.
Slang To engage in stealing, especially shoplifting or pickpocketing.
n.
1. A push upward or ahead.
2. An encouraging act or comment.
3. An increase: a big boost in salary.
[Perhaps from dialectal boostering, bustling, active.]