defender
/dɪˈfendə(r)/noun
1
- a person who defends someone or something保卫（或维护）者：
a determined defender of British interests.
英国利益的坚定维护者。
1.1
- Bridge either member of the partnership that did not win the auction【桥牌】守方。比较DECLARER.
2
- (in sport) a player whose task it is to protect their own side's goal（体育用语）防守队员。
词源
Middle English: from Old French defendeor.