mothball

n 1 small ball made of a strong-smelling substance, used for keeping moths away from stored clothes 卫生球; 樟脑丸. 2 (idm 习语) in `mothballs stored and not used for a long time 封存不用: old aircraft kept in mothballs 封存的旧飞机.

mosaic, Moscow, moselle, mosey, Moslem, mosque, mosquito, mosquito-net, moss, moss-grown, mossback, mossy, most, mostly, MOT, mote, motel, motet, moth, moth-eaten, mother, mother country, Mother Nature, mother ship, Mother Superior, mother tongue, mother's boy, Mother's Day, mother-in-law, mother-of-pearl, mother-to-be, motherhood, motherland, motherless, motherlike, motherliness, motherly, mothproof, motif, motile,