灭绝的英文：
extinguish
become extinct

参考例句：

To destroy totally;exterminate.
完全消灭;灭绝

A member of the genus Homo,which includes the extinct and extant species of human beings.
人人属中的一支，它包括灭绝的及现存的人类

Any of various extinct lungfishes of the genus Ceratodus,of the Triassic and Cretaceous periods.
澳洲肺鱼，角齿鱼三叠纪和白垩纪的一种已灭绝的角齿鱼属肺鱼

Of,relating to,or characteristic of these extinct humanlike primates.
南方古猿的属于、关于或有这类已灭绝的人形猿特征的

A Paleozoic microfossil usually having a toothlike shape and considered to be the remains of an extinct marine organism.
牙形刺一种古生代微化石，一般有牙状形体，被认为是一种已灭绝海生生物体的残骸

Many animals are already extinct, or getting close to extinction.
不少动物已经灭绝或滨临灭绝。

Exterminate all the inhabitants of the village
灭绝村中所有的生灵

This kind of animal is in danger of becoming extinct.
这种动物有灭绝的危险。

Thou shalt destroy them that speak leasing.
说谎言的，你必灭绝。

This species was doomed to extinction.
这一种类注定要灭绝。

extinguish是什么意思：
v. 使熄灭，扑灭；使破灭

amortization extinguishment
熄灭

But who can describe the thousand means of extinguishing the moccoletto?
但谁能列举出那成千上万种熄灭长生烛的方法呢？

A contract subject to a time of expiration is　extinguished at such time.
附终止期限的合同，自期限届满时失效。

become是什么意思：
v. 成为；变得；适合；相称

To become blunt.
变钝，变迟钝

To become inflated.
膨胀变得充了气的。

To become firm or gelatinous; congeal.
凝固凝结或变硬；冻结

extinct是什么意思：
adj. 灭绝的；消逝的；熄灭了的

The volcano is extinct.
这座火山是座死火山。

Many animals are already extinct, or getting close to extinction.
不少动物已经灭绝或滨临灭绝。

The plant is now in danger of extinction.
这种植物现在有绝种的危险。