croon

v. 低声歌唱，低吟

crochet, crock, crocked, crockery, crocodile, crocus, Croesus, croft, crofter, croissant, cromlech, crone, crony, cronyism, crook, crook-back, crook-backed, crooked, crookedly, crookedness, crooner, crop, crop-dusting, `crop-spraying, cropper, croquet, croquette, crore, crosier (also crozier), cross, cross beam, cross off, cross out, cross-, cross-bencher, cross-benches, cross-bones, cross-bred, cross-breed, cross-check, cross-country,