Fathomless sea深不可测的海
fathomless universe微妙之死;美而神秘之死
The fathomless ocean做杂务或打仗时穿的;深不可测的海洋
So Fathomless Deep如此深邃
The Fathomless Mastery唱片名
a man of fathomless energy精力无穷的人
ADJ（形容词） Something that is fathomless cannot be measured or understood because it gives the impression of being very deep, mysterious, or complicated. 深不可测的; 不能理解的
...the fathomless space of the universe.
...深不可测的宇宙空间。