对合

Traditional form:

對合

Pinyin (reading):

duìhé

Definitions:

• a profit equal to the amount one invested
• (math.) involution

Characters:

• 对 - correct, right; facing, opposed
• 合 - to combine, to join, to unite; to gather

Traditional characters:

• 對 - correct, right; facing, opposed
• 合 - to combine, to join, to unite; to gather