Definition of inscrutable:
qabalistic, study at mysterious, mystical, mystic, difficult, bass, thick, obscure, sibylline, unfathomed, impenetrable, cryptic, inexplicable, orphic, secret, recondite, mysterious, occult, knowledge, incomprehensible, impenetrable, unintelligible, kabbalistic, hidden, enigmatical, cryptical, blank, dark, uncomprehensible, rich, abstruse, deep, transcendental, unknown, unfathomable, mystifying, cabalistic.
unexcitable (part of speech: adjective)
- "The Lash", Olin L. Lyman.
- "Home Fires in France", Dorothy Canfield.
- "Siddhartha", Herman Hesse.