1. Important derivatives are: night, nocturnal, equinox
重要派生词为： night， nocturnal， equinox

2. Night.
夜晚，晚上，黑暗.

3. O-grade form *nok ^w-t- .
O级形式*nok ^w-t- .

4. night , from Old English niht , neaht , night, from Germanic *naht- .
night , 源自 古英语 niht , neaht , 晚上, 源自 日耳曼语 *naht- .

5. nocti- , ( nocturn ), nocturnal , equinox , from Latin nox (stem noct- ), night.
nocti- , ( nocturn ), nocturnal , equinox , 源自 拉丁语 nox （字干 noct- ), 夜晚.

6. noctuid , noctule , from Latin noctua , night owl.
noctuid , noctule , 源自 拉丁语 noctua , 猫头鹰.

7. nyctalopia , nyctitropism , from Greek nux (stem nukt- ), night.
nyctalopia , nyctitropism , 源自 希腊语 nux （字干 nukt- ), 晚上.

nek的词源：

8. Pokorny nek ^?(t)- 762.
波科尔尼nek ^?(t)- 762.

1. Important derivatives are: pernicious, nuisance, innocent, innocuous, noxious, obnoxious, necrosis, necromancy, nectar, nectarine
重要派生词为： pernicious， nuisance， innocent， innocuous， noxious， obnoxious， necrosis， necromancy， nectar， nectarine

2. Death.
死亡，谋杀，杀害.

3. internecine , pernicious , from Latin nex (stem nec- ), death.
internecine , pernicious , 源自 拉丁语 nex （字干 nec- ), 谋杀，杀害.

4. Suffixed (causative) o-grade form *nok-eyo- . nocent , nocuous , nuisance ; innocent , innocuous , from Latin noc?re , to injure, harm.
添加后缀的（表示原因）O级形式*nok-eyo- . nocent , nocuous , nuisance ; innocent , innocuous , 源自 拉丁语 noc?re , 伤害, 损害.

5. Suffixed o-grade form *nok-s- . noxious ; obnoxious , from Latin noxa , injury, hurt, damage entailing liability.
添加后缀的O级形式*nok-s- . noxious ; obnoxious , 源自 拉丁语 noxa , 伤害, 损害, 蒙受损失.

6. Suffixed full-grade form *nek-ro- . necro- , necrosis ; necromancy , from Greek nekros , corpse.
添加后缀的全级形式*nek-ro- . necro- , necrosis ; necromancy , 源自 希腊语 nekros , 尸体.

7. nectar , ( nectarine ), from Greek nektar , the drink of the gods, “overcoming death” ( *tar- , overcoming; see ter…- ² ).
nectar , ( nectarine ), 源自 希腊语 nektar , 神喝的饮料, “战胜死亡” ( *tar- , 克服，胜过; 参见 ter…-² ).

nek的词源：

8. Pokorny ne^?- 762.
波科尔尼ne^?- 762.

9. Important derivatives are: enough, oncology
重要派生词为： enough， oncology

10. To reach, attain.
达到, 获得.

11. O-grade form *nok- . enough , from Old English gen?g , enough, from Germanic *gan?ga- , sufficient, from *ga-nah , “suffices” ( *ga- , intensive prefix; see kom ).
O级形式*nok- . enough , 源自 古英语 gen?g , 足够的, 源自 日耳曼语 *gan?ga- , 充分的, 源自 *ga-nah , “足够” ( *ga- , 强调前缀; 参见 kom).

12. Variant form *enk- .
变体形式*enk- .

13. oncogenesis , oncology , from Greek onkos , a burden, mass, hence a tumor, from reduplicated enenkein , to carry.
oncogenesis , oncology , 源自 希腊语 onkos , 重担, 块, 此处意为肿瘤, 源自重复的 enenkein , 携带.

14. Compound root *bhrenk- (see bher ¹ ).
复合字根*bhrenk- （参见 bher¹ ).

nek的词源：

15. Pokorny ene^?- 316.
波科尔尼ene^?- 316.