When the pressure increases, for most substances their melting point also increases and this may cause them to turn from a liquid to a frozen solid even without a temperature change.
But, water is one of those extremely rare exceptions to this rule! For water, when the pressure increases, its melting point decreases! The reason for this is that, unlike with virtually all other substances, as water goes from being a liquid to a frozen solid, its density decreases rather than increases! (and it therefore expands on freezing making water one of those extremely rare exceptions to that rule as well!) so therefore pressure (which tends to squash substances to make them more dense), unlike with other substances, actually opposed freezing of water rather than encouraging it.
On the other hand, water’s boiling point responds to pressure like any other substance -as pressure increases its boiling point also inceases resulting in a higher required temperature to get it to boil.
Some substances, such as CO2, don’t have a liquid phase at one atmospheric pressure but do have a liquid phase at much higher pressures. No substance has a stable liquid phase at zero pressure. For example, it is impossible to have liquid water in the vacuum of outer space and liquid water, depending on its temperature, either instantly freezes solid or boils into gas or does a combination of both when exposed to a total vacuum.