multiply/'mʌltɪplaɪ, -tə- $ -tə-/

v. add a number to itself several times

➭ ts. -plies

➭ pt. & pp. -plied

v. [T] 乘；使相乘：[multiply sth¹ by sth²] Three multiplied by four is twelve. (= If you multiply three by four you get twelve.) 3乘以4等于12。

构词multi (多) + ply (=fold 折叠；倍数) →“多次折叠”引申为“乘”

同根 apply; reply

常犯错误

✗ Two multiplied five is ten.

✓ Two multiplied by five is ten. 2乘以5等于10。