: this radical brings the sound of 'en'

Examples:
珍 pinyin: zhēn

Chinese phrase: 珍珠 zhēn zhū - pearl
珍贵 zhēn guì- rare

诊
pinyin: zhěn

Chinese phrase: 门诊 mén zhěn - clinic
诊断 zhěn duàn - diagnose

趁 pinyin: chèn

Chinese phrase: 趁机 chèn jī - take advantage of an opportunity
趁热打铁 chèn rè dǎ tiě - strike the iron while it is hot