concertina

v (pt, pp concertinaed, pres p concertinaing) [I] fold up (as if) by being pressed together from each end （像）（从各端受挤压）摺起: The lorry had concertinaed after crashing into the tree. 卡车撞到大树後摺在一起.

conceivably, conceive, concentrate, concentrate on, concentrated, concentration, concentric, concept, conception, conceptive, conceptual, concern, concerned, concernedly, concerning, concert, concert grand, concert-goer, concert-master, concerted, concerto, concess, concession, concessionaire, concessionary, concessive, conch, conchology, conciliate, conciliation, conciliatory, concise, concisely, conciseness, conciseness, concision, concision, conclave, conclude, conclusion, conclusive,