kɹʌst kɹʌst ˈfɹɛʃnəs ɪm.ˈpɜː.tɪ.nəns ɪm.ˈpɝ.tɨ.nəns ˈɪmpjədəns ɪnkɹʌsˈteɪʃən ˈɪnsələns form a crust or form into a crust The bread crusted in the oven the trait of being rude and impertinent; inclined to take liberties the outer layer of the Earth a hard outer layer that covers something