ìng-kai-liân應該然

to be only right and proper

to be only right and proper; to be taken as a matter of course; naturally

English Wiktionary, “應該然” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E6%87%89%E8%A9%B2%E7%84%B6 · confidence: Medium (Wiktionary, Hokkien)