reciprocating

باللغة العربية: ترددي، متبادل

1. That moves back and forth or up and down.
2. Of an engine type, that has one or more pistons that move back and forth or up and down.
3. Of an other machine, whose mechanism relies on a back and forth or up and down motion.
4. Of a person or their actions, responding in kind. · reciprocating behavior