Yīshēng zhěnduàn tā huàn yǒu gōngnéngxìng xiāohuà bùliáng.
The doctor diagnosed him with functional dyspepsia.
Tips
usage
功能性 is widely used in medicine (功能性疾病, functional disorders), technology (功能性设计, functional design), and everyday language. It describes something designed or evaluated by its function rather than aesthetics or other qualities.