From Proto-Japonic *penti (“elbow”).
*pezi
- elbow
- Northern Ryukyuan:
- Kikai: 肘, 肱, 臂 (piji)
- Kunigami: 肘, 肱, 臂 (pijī)
- Northern Amami-Oshima: 肘, 肱, 臂 (hiji)
- Okinawan: 肘, 肱, 臂 (fijigē) (< *pidigai)
- Oki-No-Erabu: 肘, 肱, 臂 (hiji, hijī)
- Southern Amami-Oshima: 肘, 肱, 臂 (hiji)
- Toku-No-Shima: 肘, 肱, 臂 (fïji, sïzï)
- Yoron: 肘, 肱, 臂 (piji)
- Southern Ryukyuan:
- Miyako: 肘, 肱, 臂 (pizï)
- Yaeyama: 肘, 肱, 臂 (pizï)
- Yonaguni: 肘, 肱, 臂 (chidinka) (< *pidi-no-ka)
- Thorpe, Maner Lawton (1983) Ryūkyūan Language History[1], Doctoral dissertation. University of Southern California, pages 282-283