Synonyms of unfathomable
- 1. unfathomable (vs. fathomable), unsoundable, deep
- usage: of depth; not capable of being sounded or measured
- 2. abysmal, abyssal, unfathomable, deep (vs. shallow)
- usage: resembling an abyss in depth; so deep as to be unmeasurable; "the abyssal depths of the ocean"
- 3. unfathomable, incomprehensible (vs. comprehensible), uncomprehensible
- usage: impossible to come to understand
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