Focus on the pronunciation of build up (sth)
English definition of “build up (sth)”
build up (sth) — Phrasal Verb with build
/bɪld/ verb (built, built)
› [I or T] to increase in quantity, or to add more of something so it increases in quantity: build up shares/stock/wealth At this time of year, stores are building up stock for Christmas.build up experience/success/achievements She joined the company in 2000 and has built up considerable experience in marketing.