Pak = mouth of a river; e.g. Pak Oo, mouth of river Oo.
Nam = river; e.g. Nam Oo, river Oo (a always long, as in
barn).
Hoay = mountain torrent.
Keng = rapid; e.g. Keng Fapa, Fapa rapid.
Luang = great or chief; e.g. Keng Luang, the great rapid.
Doi or puh = Siam word Kao = hill.
Ban or Bang = house or village (used indiscriminately).
Sala = rest-house.
Muang = town or township, often district or province.
Chow Muang = literally, chief of the township = governor.
Klong = stream or canal.