倍: -fold; times

倍 bèi

noun | measure word
: (two, three etc) -fold; times (multiplier); double
: to increase or multiply

Kun Reading
none applicable

倍數[数] bei4shu4: multiple; multiplier; factor
[倍数 | ばいすう baisuu: multiple]

倍兒[儿] bei4er: very; much (Beijing dialect)

倍增 bei4zeng1: to double; to redouble; to increase many times over; to multiply by a factor; multiplication

倍感 bei4gan3: to feel even more; to be extremely (sad, lonely, delighted etc)

百倍 bai3bei4: a hundredfold; a hundred times
[ひゃくばい hyakubai: hundredfold]

兩[两]倍 liang2bei4: twice as much; double the amount

OR 雙倍 [双倍] shuang1 bei4: twofold; double
[二倍 | にばい nibai: double; twice; twofold]

三倍 san1bei4: triple; three times as much
[さんばい sanbai: three-fold; three times]

加倍 jia1bei4: to double; to redouble

十倍 shi2bei4: tenfold; ten times (something)
[じゅうばい juubai: ten times; tenfold]

Japanese common word | expression | yojijukugo 四字熟語 | idiom
倍にして返す | ばいにしてかえす bai ni shite kaesu
: to repay double the original amount
: to repay x times the original amount

勇気百倍 | ゆうきひゃくばい yuuki hyakubai
: (yoji) inspire someone with fresh courage; with redoubled courage

薬九層倍 | くすりくそうばい kusuriku soubai
: (yoji) “There is a huge markup in medicines.”

可愛さ余って憎さ百倍 | かわいさあまってにくさひゃくばい kawai sa amatte niku sa hyakubai
: Excessive tenderness switches to hundredfold hatred

Chinese expression | chengyu 成語 | idiom
事半功倍 shi4 ban4 gong1 bei4
OR
及時處理，事半功倍 [及时处理，事半功倍] ji2 shi2 chu3 li3 , shi4 ban4 gong1 bei4
: timely handling doubles the effect and halves the effort; the right approach saves effort and leads to better results; a stitch in time saves nine

事倍功半 shi4 bei4 gong1 ban4
: twice the effort for half the result

信心百倍 xin4 xin1 bai3 bei4
: brimming with confidence

精神百倍 jing1 shen2 bai3 bei4
: lit. vitality a hundredfold; refreshed; one’s vigor thoroughly restored