Double

二倍

nibai

(twice the quantity)

二重

futae

(made up of two matching or complementary elements)

二重

nijū

(made up of two matching or complementary elements)

二重

futae

(twice the quantity)

二重

nijū

(twice the quantity)

双

sō

(made up of two matching or complementary elements)

二倍

nibai

(twice the number or size etc)

二重

futae

(twice the number or size etc)

二重

nijū

(twice the number or size etc)

替え玉

kaedama

(a person resembling or standing for another)

二倍する

nibai suru

((transitive) to multiply by two)

複製する

fukusei suru

(to copy)