濠

Phono-semantic compound:

水 (물 수, “water”) — semantic, indicating relation to water.

豪 (호걸 호, “grand, powerful”) — phonetic, providing the sound.

Thus originally meant a large trench filled with water, i.e., a moat.

濠洲 (호주) — Australia (literally “Moat continent,” from transliteration practice).

城濠 (성호) — castle moat.

護濠 (호호) — protective moat.

As a geographic name element, 濠洲 (“호주”) became the standard rendering for Australia in Sino-Korean usage.

In modern Chinese, 濠 is also used poetically for moats or large ditches, while in Korean it survives mostly in 호주 (濠洲).