當其然 [当－－]

Jyutping dong1 kei4 jin4
Pinyin dāng qí rán

Definitions (Wiktionary)
  1. verb, Xiamen, Zhangzhou-Hokkien
    to be only right and proper; to be taken as a matter of course; naturally
    (syn.) 理所當然, 理所当然, 應該然, 应该然