mortgage; security; pledge

foodstuff that has undergone retort sterilization

necessity (quality or state of being necessary, unavoidable, or absolutely requisite)

unnecessary

needlessness

necessary evil

破廉恥: shameless

破廉恥: shamelessness

(informal) "boil-treatment": treating someone carefully due to a volatile or otherwise unwelcoming personality

名刀: an excellent blade, famous sword / 銘刀: a sword inscribed with the maker's name / 名湯: a famous hot spring / 迷答: a nonsensical answer, a stupid answer / 名答: good answer