Buttocks/Rump

Note the collocation of BUTT and HEAVY for words meaning ‘lazy; sluggish’. See Jingpho maidang li ‘heavy, slow, lazy’; Lahu qhɛ̂-qhɔ hɔ̂ ‘sluggish, slow-moving; lazy’. (Note also the English expression ‘lead in your pants’, and Japanese koshi ga omoi ‘hips are heavy’.)

It is interesting to note that Padam-Mising [Abor-Miri] preserves four distinct PTB roots in four synonyms glossed ‘buttock’: ko-dun, ko-piang, ta-pong, ki-pum (roots #574 PTB *r-t(u/i)l BUTTOCKS / HEEL / DULL / BLUNT / ROUNDED PART, #399 PTB *(p/b)laŋ HIPS / BUTTOCKS, #404 PTB *(p/b)waŋ HIPS / BUTTOCKS / TAIL / ANUS, and #163 PTB *s-bʷa(m/p) SWELL / SWOLLEN / FAT / THICK / ROUNDED PART resp.).