Xu Collection, Middle Volume, Radical: Mound (fù) Page 1346, Entry 01 Pronounced yu yi (falling tone) — same as "yì". Refers to "yì zuò", describing the appearance of mountains. Also, pronounced gu tai (falling tone) — same sound as "gài". Meaning is unclear. Also, pronounced jū dài (falling tone) — same sound as "gài". Meaning is precipitous.