î-má-tiǔⁿ姨媽丈

great-uncle

great-uncle (husband of father's mother's sister)

English Wiktionary, “姨媽丈” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E5%A7%A8%E5%AA%BD%E4%B8%88 · confidence: Medium (Wiktionary)