眼珠子

yǎn zhū zi

eyeball

fig. the apple of one's eye (i.e. favorite person)

眼

yǎn

eye (CL:隻|只[zhi1],雙|双[shuang1])

珠

zhū

bead

子

zi

noun suffix, as in 椅子[yi3 zi5] "chair"