1. unfathomable - Adjective
2. unfathomable - Adjective Satellite
resembling an abyss in depth; so deep as to be unmeasurable
incapable of being fully understood
of depth; not capable of being sounded or measured
Source: WordNetLove involves a peculiar unfathomable combination of understanding and misunderstanding. Diane Arbus
In vain would science scan and trace Firmly her aspect. All the while, There gleams upon her far-off face A vague unfathomable smile. Alfred Austin
The way of Heaven and Earth may be completely declared in one sentence: They are without any doubleness, and so they produce things in a manner that is unfathomable. Confucius
Every human life involves an unfathomable mystery, for man is the riddle of the universe, and the riddle of man in his endowment with personal capacities. Harry Emerson Fosdick
My power is immeasurable; My truth inexplicable, unfathomable. Sathya Sai Baba
Unfathomable mind, now beacon, now sea. Samuel Beckett