The noun 耳环 (ěrhuán) means 'earring,' a piece of jewelry worn on the ear. It is composed of 耳 (ear) and 环 (ring/loop). It is used in everyday language when discussing jewelry, fashion, or personal appearance.
她今天戴了一对银色的耳环。
Tā jīntiān dài le yí duì yínsè deěrhuán.
She wore a pair of silver earrings today.
这副耳环是妈妈送给我的生日礼物。
Zhè fùěrhuán shì māma sòng gěi wǒ de shēngrì lǐwù.
These earrings are a birthday gift from my mom.
你的耳环真好看,在哪里买的?
Nǐ deěrhuán zhēn hǎokàn, zài nǎlǐ mǎi de?
Your earrings look really nice; where did you buy them?