TYPE B: PARTIAL REDUPLICATION, i.e., CV+CVC (48 in Dempwolff 1938 called "root reduplication")
*bu+buŋ	'ridge of roof'  (Dbl: buŋ+buŋ 'ridgepole' - Type A)
*Də+Dəm	'dark'  (Dbl: Dəm+Dəm - Type A)
*lə+ləs	'lose consciousness'
*lu+lun	'roll together'
*pi+pis	'rub away, grind down'
*pu+put	'blow'  (Dbl: *put+put - Type A)
*si+sip	'penetrate'