Từ tiếng Mã Lai nguyên thuỷ *əmpat.
ปัยจ (pac)
- bốn.
- Hogan, David W. (1988) Urak Lawoi': Basic Structures And Dictionary (Pacific Linguistics. Series C-109)[1], Canberra: Pacific Linguistics, Research School of Pacific and Asian Studies, The Australian National University, →ISBN, tr. 53