From Proto-Japonic *pukoru (“to swell”).
*pukore
- to swell
- Northern Ryukyuan:
- Kikai: 膨っきゆい (pukkiyui), 膨っきぃゆい (fukkïyui), 膨っきうい (pukkiui)
- Kunigami: 膨っきん (phukkin)
- Northern Amami-Oshima: 膨くりぃるり (fukurïruri)
- Okinawan: 膨っくぃゆん (fukkwiyun)
- Oki-No-Erabu: 膨くりゆん (fukuriyun)
- Southern Amami-Oshima: 膨くっりぃゆむっ (fukrïyum)
- Toku-No-Shima: 膨っくいぃりぃ (fukkwïrï)
- Yoron: 膨くりゅん (fukuryun)
- Southern Ryukyuan:
- Thorpe, Maner Lawton (1983) Ryūkyūan Language History[1], Doctoral dissertation. University of Southern California, page 337