eye / small hole / crux (of a matter) / CL:隻|只[zhi1],雙|双[shuang1] / classifier for big hollow things (wells, stoves, pots etc)
眼
=
目
+
艮
:
Inside of the anthill, Maud Younger played a prank on the Eye of Providence. She told it that she would apply a mask to alleviate the wrinkles around its eyes, but instead she just covered its whole eye with chewing gum.