Yes. Rock can be liquified by raising its temperature to that of the melting point of the mineral constituent with the highest melting point.
A combination of increased temperature, a decrease in confining pressure or addition of volatiles can all act to cause rock to melt.
Helium
The centre of the Earth (the inner core) is actually composed of iron and nickel rather than rock. It is solid because the very high pressure drives up the melting temperature of these metals beyond the temperature at the core.
Crystallines can liquefy under pressure if it is sufficiently high. Generally the opposite happens where they become more dense and compressed as the pressure increases.
The critical temperature of a gas is the temperature at or above which no amount of pressure, however great, will cause the gas to liquefy.
Other words for melt are thaw, defrost, liquefy, and dissolve.
The inner core of the Earth, which is composed of metal rather than rock, does remains solid because it is under immense pressure.
All forms of gas will liquefy at a sufficiently low temperature.
All forms of gas will liquefy at a sufficiently low temperature.
You can liquefy metal by heating it to a high enough temperature.
The center of Earth is not rock but metal. While that metal is well above its normal melting point it is kept solid by the enormous pressure found inside Earth.
The suffix in "liquefy" is "-fy," which means "to make" or "to cause to become."
Maybe
The root word for "liquefy" is "lique-" which comes from the Latin word "liquere" meaning "to be liquid."
Helium
Yes
sandy soils
Cool the gas sufficiently and it will liquefy.