词根：croch (croach, crouch, crutch, crook) = hook, to bend

  来自盎格鲁-撒克逊语的croch 意为hook,to bend。其变形为croach,crouch,crotch,crutch,crook。同义词根有来自拉丁语的clin/cli,flect/flex,cumb/cub等。

同源词：

1. encroach（像钩子一样蜷缩在里边en(=in) + croach<croch(=hook,bend)）
  vi. on + sth 侵入侵蚀；侵害（权利等）
  encroachment n.侵入；侵害；侵蚀
  suburban creep is encroaching on the family farm where i grew up. 我在我家的农场长大，现在它正受到郊区那些小偷的侵害。

2. crochel
  n.钩针编织（品） v.用钩针编织
  crochet hook 钩针

3. crouch
  v.（因害怕或要躲藏而）蹲伏；（动物准备跳跃前）蜷缩（身体） n.下蹲（姿势），蜷缩（姿势）*crouch<croch(=bend)

4. crotchety
  adj.反复无常的；有奇想的 *crotch<croch(=bend)
  crotchet n.怪想，奇想；反复无常；四分音符

5. crotch
  n.（树木的）枝丫；胯部，裤裆 *crotch<croch(=bend)
  sti in a crotch of a tree 坐在树枝上

6. crutch
  n.拐杖；（样子、用途像拐杖的）支撑物；精神支柱  *crotch<croch(=bend)
  go about on crutches 拄着拐杖走

7. crook
  n.钩状物；（牧童的）曲柄杖；（道路或河流的）拐弯处，弯曲处；骗子，小偷
  v.（使）弯曲；诈骗，欺骗 *crotch<croch(=bend)
  crookback n.驼背
  on the crook 诈骗地，以不正当手段地
  crook one's finger/arm 弯曲手指/胳膊
  crook a friend 欺骗朋友

8. crooked
  adj.弯曲的；歪的；（人、行动等）不正当的，不老实的，不正派的  *crotch<croch(=bend)
  crooked lane 弯曲的小路
  crooked stick 懒汉；不诚实的人

词根：atroc = cruel （残酷）

atrocious a. 残暴的

atrocity n. 残暴

词根：broch = pierce （刺, 缝）

brochure n. 手册（用线缝在一起的纸）

broach n. 钻孔器v开瓶塞；提出问题

词根词缀：atroc-, atroci-

【来源及含义】Latin: cruel, fierce; dark-looking, gloomy

【同源单词】atrocious, atrociously, atrociousness, atrocity

词根词缀：fier-, feroci-

【来源及含义】Latin: wild, untamed

【同源单词】ferocious, ferociously, ferociousness, ferocity, fierce, fiercely

词根词缀：procto-, proct-

【来源及含义】Greek: anus, rectum

【同源单词】ankyloproctia, aproctia, colectomy, coloproctectomy, coloproctostomy, Entoprocta

词根词缀：reciproc-

【来源及含义】Latin: reciprocus, turning back the same way, alternating; turning backward and forward; to give, to do, to feel, or to show in return

【相关词根词缀】 Inter-related cross references, directly or indirectly, involving word units meaning "another, other, different, alternating, varied, changing": ali-; allo-; alter-; allelo-; hetero-; mut-; poikilo-; vari-.

【同源单词】reciprocal, reciprocal altruism, reciprocal cross, reciprocal determination, reciprocal hybrids, reciprocal inhibition

词根词缀：spirochet-, spirochaet-, spirocheta-, spirocheti- (long flowing)

【来源及含义】Greek: coil; [long flowing] hair; hence, "hair, bristle"; spirochetes, coil-shaped microorganisms

【同源单词】bronchospirochetosis, fusospirochetal, fusospirochetosis, spirochete, spirochetemia, spirocheticidal

词根词缀：troch-, trocho-

【来源及含义】Greek: that which is round[ed]; a wheel, a disk

【同源单词】trochal, trochanter, trochanteritis, trochlea, trochlear, trochlear nerve