coarsen

vt.vi. (使)变粗

coal, coal gas, coal oil, coal tar, coal-black, coal-face (also face), coal-hole, coal-mine (also pit), coal-miner, coal-scuttle (also scuttle), coal-seam, coalesce, coalescence, coalfield, coalition, coaming, coarse, coarse fish, coarse fishing, coarsely, coarseness, coast, coastal, coaster, coastguard, coastline, coat, coat of arms (also arms), coat of mail, coat-hanger, coat-tails, coax, coaxing, cob, cobalt, cobber, cobble, cobbler, cobblers, COBOL (also Cobol),