unsounded waters
unsounded depths
unsounded grief
A: Are there any maps of this reef?
A：有这片礁石区的地图吗？
B: No, it remains largely unsounded.
B：没有，这里大部分地方都还没测过深。
1) 指水深未测的
2) 指未发出的声音
3) 指未表达的情感
1. 未测得深度的
2. 未发出的，未表达的
adjective
1. Not having been measured for depth, especially in water.
2. Not expressed or uttered; silent.
Synonym: unmeasured, unuttered, unspoken