词根：fend, fens, fest = strike 打击
来源于拉丁语的fendere (strike)。在一些书上词根fend,fens 作为一组，有的书上如刘毅英文字根字典上面把fend 和fest 列为一组都来源于fendere ，为大家方便，这里把他们放在一起，方便大家学习。
同源词：
1. offend （of- 表示against,fend打击；“to knock or strike against” →再打击[别人]→得罪]
v. 冒犯，得罪；触怒；进攻，攻击
2. offensive [见上，-ive ...的]
adj. 冒犯的,进攻的，进攻性的，攻势的
n. [-ive 名词后缀，表示抽象名词]进攻，攻势
3. offence n. = offense
4. offend [见上，fend = fens 打击]
v.冒犯，触犯，触怒
5. offender [见上，-er 表示人]
n.冒犯者，触怒者
6. defend [de去掉+fend→去掉打击→打退敌人→保卫]
v. 保卫，防御
7. defender [见上，-er 表示人]
n.保卫者，防御者
8. defense n 保卫（defend的名词）
9. defensible [见上，-ible 能...的]
adj.能防御的
10. defensive [见上，-ive ...的]
adj.防御的，防守的，防卫的
11. defence n. = defense
12. defenceless [见上，-less 无...的]
adj.无防御的，无防守的
13. fender [fend =defend 防御，-er 表示物]
n.防御物，防护板
14. fence [=defence]
n.保卫，防护；（用作防护之物→）栅栏，围栏，篱笆
15. fencing [见上，-ing 名词后缀，表示物；防护之物→]
n.围墙，围栏，篱笆
16. infest [in- = against 打对方→]
v.横行；骚扰
17. infestation
n.横行；骚扰
18. manifest [mani = hand ,fest 打击，→用手不断的打击他使他→明白，明白了就会显示出来→]
adj.明白的
v.显示；表示
n.运货单
manifestion n.显示；证明；发表
19. manifesto [见上，-o 后缀表名词,"人,物或状态",这个后缀还有一个意思表示音乐，如solo 单独的（地）;]
n.宣言
词根词缀：pel-, -pell, -pellent, -peal
【来源及含义】Latin: push, beat, strike, knock, drive
【相关描述】Don't confuse this pel- unit with another pel- group meaning "mud, earth, clay".
【相关词根词缀】 Cross references of word families that are related directly, or indirectly, to: "push, shove, thrust": osmo-; puls-; trud-.
【同源单词】appeal, appealable, appealer, appealingly, appealingness, appellant
词根词缀：pel-, pelo-
【来源及含义】Greek: mud, earth, clay
【相关描述】Don't confuse this pel- unit with another pel- group meaning "push, beat, strike, knock, drive".
【相关词根词缀】 Cross references of word families related directly, or indirectly, to: "land, ground, fields, soil, dirt, mud, clay, earth (world)": agra-; agrest-; agri-; agro-; argill-; choro-; chthon-; epeiro-; geo-; glob-; lut-; myso-; pedo-; rhyp-; soil-; sord-; terr-.
【同源单词】pelite, pelochthophile, pelochthophilous, pelochthophily, pelochthophyte, pelocole
词根词缀：puls-, pulsi-, -pulsion, -pulsive
【来源及含义】Latin: push, beat, strike, knock, drive; drive to, force toward
【相关词根词缀】 Cross references of word families that are related directly, or indirectly, to: "push, shove, thrust": osmo-; pel-; trud-.
【同源单词】appulse, appulsive, appulsively, compulsion, compulsive, compulsively
词根词缀：vari-
【来源及含义】Latin: different, diversity, change, changing
【相关描述】Believed by some etymologists to be from varus, "bent, knock-kneed; to bend, to turn, to twist".
【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-; reciproc-.
【同源单词】divaricate, electrically variable coil, electrophoretic variants, geomagnetic secular variation, geomagnetic variation, idiovariation