The Collaborative International Dictionary
Liquefy \Liq"ue*fy\ (l[i^]k"w[-e]*f[imac]), v. t. [imp. & p. p. Liquefied (-f[imac]d); p. pr. & vb. n. Liquefying (-f[imac]`[i^]ng).] [F. liqu['e]fier, L. liquere to be liquid + facere, -ficare (in comp.), to make. See Liquid, and -fy.]
To convert from a solid form to that of a liquid; to melt; to dissolve; and technically, to melt by the sole agency of heat. [WordNet sense 1]
To convert from a gaseous form into a liquid; as, to liquefy natural gas.
Wiktionary
vb. (present participle of liquefy lang=en nodot=1); (alternative spelling of liquifying lang=en nocap=1)
Usage examples of "liquefying".
He developed this process of liquefying metals without the use of heat.
He saw his own features liquefying, streaming away and falling from the burning creature in molten tatters.
For a moment a lashing tentacle reached up from the shuddering foundations to a height of some twenty feet, then collapsed and was sucked back down into the quaking, liquefying quag of earth and fire.
Pygmalion gestured one last time, liquefying the fourth scout, then raised his finger up and blew on it before tucking it away in an imaginary holster.
When Han and Leia had yanked Captain Page free of the liquefying mass, he walked directly to the netted Yuuzhan Vong and went down on his haunches in front of the one with the longest hair.
His quad burst caught most of the port wing, liquefying it in an instant.
The scarlet beams burned the top off the cockpit, instantly liquefying the Quadanium steel.