redundant

形容词 redundant:

1. more than is needed, desired, or required
   同义词：excess, extra, spare, supererogatory, superfluous, supernumerary, surplus
2. repetition of same sense in different words- J.B.Conant
   同义词：pleonastic, tautologic, tautological

1. Skill has been made redundant by machine.
   由于使用机器，手艺已变得多余。
2. I regret having to make so many staff redundant.
   我很遗憾不得不裁减这么多职员。
3. There will be no question of anyone being made redundant.
   决不可能裁掉任何人。
4. In the sentence "She lives alone by herself", the word "alone" is redundant.
   在“她独自一人单独生活中”这个句子中，＂单独”是多余的。

re.dun.dant

adj.（形容词）
Exceeding what is necessary or natural; superfluous.
多余的：超出必需的或正常的；多余的
Needlessly repetitive; verbose.
累赘的：没有必要重复的；冗长的
Electronics Of or involving redundancy in electronic equipment.
【电子学】 冗余的：电子设备冗余的或涉及电子设备中冗余的
Of or involving redundancy in the transmission of messages.
冗余的：传输信息中冗余的或涉及传输信息中冗余的

来源：
Latin redund3ns redundant- [present participle of] redund3re [to overflow]
拉丁语 redund3ns redundant- [] redund3re的现在分词 [充满]
re-, red- [re-]
re-, red- [前缀re-]
und3re [to surge] from unda [wave] * see wed-
und3re [起伏] 源自 unda [波动] *参见 wed-

【引伸】
redun.dantly
adv.（副词）