A new word: blemish

typhoid (also typhoid fever), noun, /'taɪfɔɪd/  伤寒

a serious infectious disease that is caused by dirty food or drink

a sudden outbreak of typhoid.

cholera, noun, /'kɑlərə/ 霍乱

a serious disease that causes sickness and sometimes death. 

It is caused by eating infected food or drinking infected water.

chicken pox, noun, /ˈtʃɪkənˌpɑks/ 水痘

an infectious illness which causes a slight fever and spots on your skin.

blemish, noun, /ˈblɛmɪʃ/

a small mark, especially a mark on someone’s skin or on the surface of an object, that spoils its appearance. 

a mark that makes something imperfect or less beautiful.

an unwanted mark on the surface of something. a fact or event that causes people to respect someone or something less.

The cream is supposed to prevent blemishes on the skin.

The table had a few scratches and minor blemishes.

The book fails to mention any of the organization's many blemishes.

The incident was/left a blemish on his record/reputation.

blemish, verb, /ˈblɛmɪʃ/

to spoil something so that it is no longer beautiful or perfect → unblemished. 

to make (something) imperfect or less beautiful.

to hurt or damage the good condition of (something).

His record will be blemished by this failure..

GRAMMAR Blemish is often passive.

A series of burn marks blemish the table's surface.

The incident blemished his reputation.

- usually used as (be) blemished

Her face was wrinkled and blemished.

His reputation was blemished [=marred] by the incident.