chancre
noun /ˈʃæŋkə(r)/
/ˈʃæŋkər/
(medical- an area with an infection on the body that is not painful, especially one on the outer sex organs, caused by disease
身体上感染不痛的区域，尤指外性器官，由疾病原发引起 词源late 16th cent.: from French, from Latin cancer ‘creeping ulcer’.