solid as rock

consistent continual nonstop perpetual regular stable steady unbroken uninterrupted

even firm invariable monochrome permanent stabile uniform

connected equable habitual homogeneous immutable like the Rock of Gibraltar monophonic monotonous of a piece regularized standardized steadfast together unalterable unchanging unflappable unfluctuating unvarying

broken discontinuous imbalanced inconsistent inconstant infrequent intermittent interrupted irregular temporary unfixed unstable unsteady wobbly

changeable changing different

concluding disloyal ending fickle flagging fluctuating stopping terminable terminating undecided undetermined untrue untrustworthy varying wavering