suffocate
verb [intransitive, transitive]to die because there is no air to breathe; to kill somebody by not letting them breathe air （使）窒息而死；（把…）闷死 Many dogs have suffocated in hot cars. 许多狗在热烘烘的汽车里给闷死了。 - suffocate somebody/something
The couple were suffocated by fumes from a faulty gas fire. 由于劣质煤气取暖器漏气，这对夫妇窒息而死。 He put the pillow over her face and suffocated her. 他用枕头捂住她的脸，把她憋死了。 - (figurative)
She felt suffocated by all the rules and regulations. 她受不了所有那些条条框框的束缚。
Word Originlate 15th cent. (earlier (late Middle English) as suffocation): from Latin suffocat- ‘stifled’, from the verb suffocare, from sub- ‘below’ + fauces ‘throat’.