词根：vad, vas(wad) = to go

  来自拉丁语的vad,vas意为to go。变形为wad,同义词根有来自拉丁语的ced/cess(ceed,ceas),grad/gred/gress,it 和算来希腊语的bat(bet,bit)以及来自盎格鲁-撒克逊语的fare。
  （*拉丁文vadere(=to go)——英文字根字典）

同源词：

1. pervade （这儿、那儿，一一走遍per(=through,throughout) + vad(=go)）
  vt.遍及；弥漫于，渗透于
  pervasion n.弥漫，渗透；普及
  pervasive adj.遍及的，普遍深入的；渗透的
  According to conservatives,harmful violence pervades a lot of television programming.保守主义者认为，有害的暴力行为渗透到了很多电视节目中。

2. invade
  v.入侵，侵略；侵害；大批进入 *in(=into)
  invasion n.入侵，侵略
  invader n.侵略者，入侵者
  city invaded by tourists 游客大批涌入的城市

3. vade-mecum
  n.随身携带品；袖珍指南手册 *mecum(=together with me)

4. wade
  n.涉水而过（江、河等） *wad<vad(=go)

5. waddle
  v.蹒跚而来 n.蹒跚，摇摆的步子 wad<vad(=go)

6. evade
  v. 逃避；闪避（逃避在外面）《a- = ex- =out》

词根词缀：deleter-, deleteri-

【来源及含义】Greek: to harm, to hurt, to injure, to damage, to destroy; destroyer; harmful

【同源单词】deleterious, deleteriously, deleteriousness, deletery

词根词缀：mephiti-

【来源及含义】Latin: stench, stinking odor; poisonous smell, harmful fumes

【同源单词】mephitic, mephitical, mephitically, Mephitidae, mephitine, mephitis

词根词缀：noci-, noc-

【来源及含义】Latin: to injure, to hurt; injury, harm, harmful; trauma; a noxious or deleterious agent or influence

【相关词根词缀】 Cross references related to "pain, hurt; suffering, injury" word families: -agra; algesi-; algo-; angina-; dolor-; Masochism; odyno-; poen-; pono- (toil, work; pain); Sadism. Cross references of word families that are related directly, or indirectly, to: "wound, harm, hurt, injure": nox-; traumat-; vulner-.

【同源单词】antinociception, hygienocic, nocebo, nocebo effect, nociassociation, nociception

词根词缀：nox-, noxi-, noc-, nui-, nec-

【来源及含义】Latin: harmful, to do harm; injury, injurious; hurt, damage

【相关词根词缀】 Cross references of word families that are related directly, or indirectly, to: "wound, harm, hurt, injure": noci-; traumat-; vulner-.

【同源单词】innocence, innocency, innocent, innocently, innocuous, innocuously