extraneous

形容词 extraneous:

1. not pertinent to the matter under consideration
   同义词：immaterial, impertinent, orthogonal
2. not essential
3. not belonging to that in which it is contained; introduced from an outside source
   同义词：foreign
4. coming from the outside
   同义词：external, outside

1. Extraneous material added to written work, such as a speech, to make it longer.
   冗词赘句加在书面作品上的一些额外的材料，如一篇讲话，为使之更长一些

ex.tra.ne.ous

adj.（形容词）
Not constituting a vital element or part.
枝节的：非主要的因素或部分的
Inessential or unrelated to the topic or matter at hand; irrelevant.See Synonyms at irrelevant
无关的：对主题或手头的事情无关紧要的或无关的；没有关系的参见 irrelevant
Coming from the outside:
外来的：来自于外面的：
例句：
extraneous interference.See Synonyms at extrinsic
外界的影响参见 extrinsic

来源：
From Latin extr3neus
源自 拉丁语 extr3neus
from extr3 [outside] * see extra-
源自 extr3 [外面的] *参见 extra-

【引伸】
extra.neously
adv.（副词）
extra.neousness
n.（名词）