tan-po̍h單薄

inadequate

inadequate; scanty; thin; thin; weak; frail (either physically or mentally); feeble; flimsy; insubstantial; shallow; lacking substance

English Wiktionary, “單薄” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E5%96%AE%E8%96%84 · confidence: Medium (Wiktionary, Hokkien)