The reading is kun'yomi, since it's a kanji all alone with nothing attached. Luckily, that's also the reading you've already learned, so associate that with this vocab word.
I already forgot the face of the travel agent I met yesterday.
Koichi has very defined facial features, don't you think?
"Hey, buddy. Are you picking a fight with me? Why are you staring at me like that?" "Well, your face looks really pale. Are you okay?"