retro-rocket

n rocket engine providing power in the opposite direction to the path of flight and used to slow down or alter the course of a spacecraft, etc 制动火箭; 减速火箭.

retort, retouch, retrace, retract, retractability, retractable, retractile, retraction, retread, retreat, retrench, retrenchment, retrial, retribution, retributive, retrievable, retrieval, retrieve, retriever, retro-, retroactive, retroactively, retroflex, retrograde, retrogress, retrogression, retrogressive, retrogressively, retrospect, retrospection, retrospective, retrospectively, retrousse, retry, retsina, return, return address, return fare, return game, return match, return ticket,