preservative

preservative
noun
  1. a substance used to preserve foodstuffs, wood, or other materials against decay
    防腐剂;保护剂
adjective
  1. acting to preserve something
    保护的,保存的
    the preservative effects of freezing.
    冷冻的防腐保护作用。
语源
  1. late Middle English: via Old French from medieval Latin praeservativus, from late Latin praeservat- 'kept', from the verb praeservare (see preserve)
英语宝典
考试词汇表