house built on stilts
Refers to a dwelling raised on stilts, such as the pang uk found in Hong Kong. A specific architectural term.
In Tai O, Hong Kong, houses built on stilts still remain today.
Compound of 棚 (たな, 'shelf' or 'rack') and 屋 (や, 'house' or 'shop'), literally 'shelf house', referring to the raised platform-like structure.