  One of the main challenges for the manipulation and storage of multipartite
entanglement is its fragility under noise. We present a simple recipe for the
systematic enhancement of the resistance of multipartite entanglement against
any local noise with a privileged direction in the Bloch sphere. For the case
of exact local dephasing along any given basis, and for all noise strengths,
our prescription grants full robustness: Even states with exponentially
decaying entanglement are mapped to states whose entanglement is constant. In
contrast to previous techniques resorting to complex logical-qubit encodings,
such enhancement is attained simply by performing local-unitary rotations
before the noise acts. The scheme is therefore highly experimentally friendly,
as it brings no overhead of extra physical qubits to encode logical ones. In
addition, we show that, apart from entanglement, the resiliences of the
relative entropy of quantumness and the usefulness as resources for practical
tasks such as metrology and nonlocality-based protocols are equivalently
enhanced.
