1. situated at or extending to great depth; too deep to have been sounded or plumbed;

   "the profound depths of the sea"
   "the dark unfathomed caves of ocean"
   "unplumbed depths of the sea"
   "remote and unsounded caverns"
   

The two separated shores mingle their voices in a song of unfathomed tears.

遥遥相对的海岸在渊深莫测的泪海之歌里调和它们的呼声。

How to establish creep model of under change loads are unfathomed contents in theory studies and applications of wood rheology.

如何建立木材在变载荷下蠕变的数学模型，是木材流变学在理论研究和生产应用中迄今尚未解决的问题。

We deal now not with things of this word alone, but with the illimitable distances and as yet unfathomed mysteries of the universe.

我们不单要从现在这个世界，而且要从无法估算的距离、从神秘莫测的宇宙来论述事物。