膕 hollow of knee 15 strokes. Readings カク (on reading): 膝膕 (しっかく) popliteal fossa コク (on reading) キョク (on reading) ひかがみ (kun reading) Components 月 國 口 radical mouth 囗 radical enclosure 戈 radical halberd 月 radical moon; flesh Words using 膕 膝膕 (しっかく) popliteal fossa Jinuma: Japanese Dictionary · Word lists