Antonyms of adj unfathomable

3 senses of unfathomable

Sense 1
unfathomable (vs. fathomable) -- (of depth; not capable of being sounded or measured)

fathomable (vs. unfathomable), plumbable, soundable -- ((of depth) capable of being sounded or measured for depth)

Sense 2
abysmal, abyssal, unfathomable -- (resembling an abyss in depth; so deep as to be unmeasurable; "the abyssal depths of the ocean")

INDIRECT (VIA deep) -> shallow -- (lacking physical depth; having little spatial extension downward or inward from an outer surface or backward or outward from a center; "shallow water"; "a shallow dish"; "a shallow cut"; "a shallow closet"; "established a shallow beachhead"; "hit the ball to shallow left field")

Sense 3
unfathomable -- (impossible to come to understand)

INDIRECT (VIA incomprehensible) -> comprehensible, comprehendible -- (capable of being comprehended or understood; "an idea comprehensible to the average mind")

Similarity of adj unfathomable

3 senses of unfathomable

Sense 1
unfathomable (vs. fathomable) -- (of depth; not capable of being sounded or measured)
       => unsoundable -- (too deep to determine the depth of)
          Also See-> deep#3

Sense 2
abysmal, abyssal, unfathomable -- (resembling an abyss in depth; so deep as to be unmeasurable; "the abyssal depths of the ocean")
       => deep (vs. shallow) -- (having great spatial extension or penetration downward or inward from an outer surface or backward or laterally or outward from a center; sometimes used in combination; "a deep well"; "a deep dive"; "deep water"; "a deep casserole"; "a deep gash"; "deep massage"; "deep pressure receptors in muscles"; "deep shelves"; "a deep closet"; "surrounded by a deep yard"; "hit the ball to deep center field"; "in deep space"; "waist-deep")

Sense 3
unfathomable -- (impossible to come to understand)
       => incomprehensible (vs. comprehensible), uncomprehensible -- (difficult to understand; "the most incomprehensible thing about the universe is that it is comprehensible"- A. Einstein)