to increase one's savings貯金を殖やすちょきんをふやすincrease one's savings: 貯金{ちょきん}[貯蓄{ちょちく}?蓄え]を増やすamount of one's savings: 貯蓄高{ちょちく だか}build up one's savings: 財産をためる、財産を作る