chalk    ingwa
En-En dictionary 
ikibaho (ibi-  4  class 4
singular: iki-,ic-
plural: ibi-,ivy-
  
1. wooden board, 2. blackboard, chalkboard
ingwa (in-)     3  class 3
singular: i-,in-
plural: i-,in-
  
chalk, chalky rock
chalkboard    ikibaho
En-En dictionary