concessionary

adj involving a concession(2) （对某类人）减价的: concessionary rates/prices （对某类人）减低的费用[价格].

concentration, concentric, concept, conception, conceptive, conceptual, concern, concerned, concernedly, concerning, concert, concert grand, concert-goer, concert-master, concerted, concertina, concerto, concess, concession, concessionaire, concessive, conch, conchology, conciliate, conciliation, conciliatory, concise, concisely, conciseness, conciseness, concision, concision, conclave, conclude, conclusion, conclusive, conclusively, concoct, concoction, concomitant, concord,