unfathomable   (Sound)

The adj unfathomable has 3 senses

• unfathomable -- (of depth; not capable of being sounded or measured)


• abysmal, abyssal, unfathomable -- (resembling an abyss in depth; so deep as to be unmeasurable; "the abyssal depths of the ocean")


• unfathomable -- (impossible to come to understand)