Entry record from Roesler (2011): Central Asmat
betiw
• older sibling (in comparison); term of address for other sibling; older plant or animal (in comparison).
Encyclopedic info: Kinship term of reference for older brother or sister when compared with younger aykun. Also used to compare plants and animals.
Reference: 1.6337; 2.1164; 4.7; 6.710; 9.803