cairn

n mound of rough stones built as a landmark or as a memorial, eg on a mountain top 堆石标（作路标或纪念用的石堆, 如在山顶上的）.

cadet corps, cadge, cadger, cadmium, cadre, Caesar, Caesarean, caesura, cafe, cafeteria, caffeine, caftan (also kaftan), cage, cage / keIdV; kedV/, cagey, cagily, caginess (also cageyness), cagoule, cahoots, caiman, caisson, cajole, cajolery, cake, cal, CAL (also Cal), calabash, Calais, calamine, calamitous, calamity, calcification, calcify, calcination, calcine, calcium, calcium carbide, calcium hydroxide, calculable, calculate,