bottom    ikibuno
En-En dictionary 
inguru (in-)     3  class 3
singular: i-,in-
plural: i-,in-
  
little stones taken from bottom of stream and offered to spirits in a little house
kuzīkurura (-zīkuruye)   v    to mix up, to put what's on the bottom on top, to take out of a hole in the ground what one has put there
ikibuno (ibi-  4  class 4
singular: iki-,ic-
plural: ibi-,ivy-
  
bottom, bum