lock washer
— Noun
– English
～ washer that prevents a nut from loosening
laying waste
— Noun
– English
～ destruction achieved by causing something to be wrecked or ruined
low-level radioactive waste
— Noun
– English
～ (medicine) radioactive waste consisting of objects that have been briefly exposed to radioactivity (as in certain medical tests)
lay waste to
— Verb
– English
～ cause extensive destruction or ruin utterly; "The enemy lay waste to the countryside after the invasion"
listening watch
— Noun
– English
～ a watch established for the reception of traffic of interest to the unit maintaining the watch