  Despite water is the most studied substance in the Earth, it is not
completely understood why its structural and dynamical properties give rise to
some anomalous behaviors. Interesting properties emerge when experiments at low
temperatures and/or high pressures, are performed. Here we report dielectric
measurements of cold water under constrained conditions, i.e. water that below
the melting point can not freeze. The inner pressure shifts the {\alpha}
relaxation peak to similar frequencies as seen in ice Ih. Also, when we reach
the triple point at 251 K, ice III seems to form. As far as we know, this via
to obtain such crystalline phase has not been observed.
