unutterable

As adjectives the difference between inexplicable and unutterable

is that inexplicable is impossible to explain; not easily accounted for while unutterable is not utterable; incapable of being spoken or voiced; inexpressible; ineffable; unspeakable.

As adjectives the difference between inapprehensible and unutterable

is that inapprehensible is that cannot be apprehended; not apprehensible to or graspable by either body or mind while unutterable is not utterable; incapable of being spoken or voiced; inexpressible; ineffable; unspeakable.

As adjectives the difference between unutterable and inutterable

is that unutterable is not utterable; incapable of being spoken or voiced; inexpressible; ineffable; unspeakable while inutterable is unutterable; inexpressible.

As a noun taxonomy

is the science or the technique used to make a classification.

As an adjective unutterable is

not utterable; incapable of being spoken or voiced; inexpressible; ineffable; unspeakable.