正せい逆ぎゃく

noun-modifying (irregular)

forward and reverse; normal and reverse

Used prenominally to describe something that can operate or be considered in both forward and reverse directions, such as rotation, order, or logic.

• このモーターは正せい逆ぎゃく回かい転てんが可か能のうです。

  This motor can rotate forward and reverse.