frag == breakfragile 易碎的fragment 碎片fracture 骨折
gen == producegenerate 产生genetics 遗传学genesis 起源，创始
geo == land;earthgeology 地理学geometry 几何学geocide 地球末日
grad == go;stepgraduate 毕业gradual 逐步的degrade 退化，堕落
graph/gram == write;writingtelegraph 电报program 节目，说明书diagram 图表
grate/grati == thanksgrateful 衷心感谢的gratitude 感谢　
grav == heavy;seriousgravity 重力；严重性grave 严重的gravimeter 比重计，测重器
gress == go;walkprogress 进步aggressive 侵略的congress 会议
herb == grassherbal 草本植物的；草药书herby 长满草的，似草的　
humid == wethumidity 湿度，湿气humidify 使湿润　
hydr == water;liquidhydroelectric 水电的hydroplane 水上飞机hydrospace 海洋世界
ject == throweject 喷射；逐出inject 注射reject 拒绝
juven == youngjuvenile 青少年rejuvenate (使)返老还童juvenilia 少年文艺读物
just/jur == justjustify 证明正确jurist 法学家jury 陪审团
labor == worklaborious 费力的collaborate 合作，协作　
later == side;partybilateral 双边的unilateral 单方的equilateral 等边的
leg == lawlegislate 立法illegitimate 非法的legislature 立法机关
literat == letterliterature 文学illiterate 文盲semiliterate 半文盲的
loc == placelocation 地点allocate 分配localism 地方主义
lumi == light;brightilluminate 照明illuminance 照明度luminary 发光体，杰出人物
magni == big;greatmagnificent 宏大的magnify 放大magnitude 巨大，广大
man(u) == handmanufacture 生产，加工manage 管理manuscript 手稿
mar == seasubmarine 潜艇maritime 海事的，海运的mariner 海员
meter/metri == measurethermemeter 温度计altimeter 高度计　
mit/miss == sendemit 放射vomit 呕吐transmission 播送，传送
mort == deathmortal 致命的immortal 不朽的postmortem 死后的
nomin == namenominal 名义上nominate 提名innominate 无名的，匿名的
nounce == proclaimpronounce 发音denounce 公开指责　
ortho == straight;correct orthodox 正统的orthopaedy 矫正术　
pater/patr == fatherpaternal 父亲般的patriarch (男性)族长patricide 弑父；杀父者
pathy == feelingsympathy 同情antipathy 反感empathy 移情
ped == footpedestrain 行人expedition 远征(队)pedal 足的；踏板
pel/pulse == push;driveexpel 驱逐impulse 冲动dispel 驱散
pend/pens == use up;hangexpense 花费expenditure 开支suspend 悬浮；使悬而未决
phon == soundheadphone 耳机symphony 交响乐microphone 麦克风
plic = foldduplicate 二倍的，副本complication 综合症；并发症；复杂implicit 含蓄的
port == carryporter 脚夫export 出口passport 护照