• 倍ばい — times / double
• 二倍にばい — twice / two times
• 倍増ばいぞう — double increase
• 倍率ばいりつ — magnification rate
• 三倍さんばい — triple
• 十倍じゅうばい — tenfold

倍 is composed of the radical 亻 (にんべん) indicating a person, and the right side, 咅, provides the sound. It originally referred to someone who stands in place of another — hence "double" or "multiple". Today, it's widely used to express multiplication or comparison.

値段ねだんが二倍にばいに上あがった。
The price doubled.

この本ほんは 五倍ごばいの値打ねうちがある。
This book is worth five times as much.

🎧 Listen to バイ