阿姆河 aa³ mou⁵ ho⁴ {Ā mǔ Hé}

1. Amu Darya, the biggest river of Central Asia, from Pamir to Aral sea, forming the boundary between Afghanistan and Tajikistan then flowing through Turkmenistan and Uzbekistan
2. formerly called Oxus by Greek and Western writers, and Gihon by medieval Islamic writers