Early Primitive Elvish
tiqi
root. *melt, thaw
tiq-
verb. to melt
There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.
An unglossed root ᴱ√TIQI appeared in the Qenya Lexicon of the 1910s with derivatives like ᴱQ. tiqi- “melt” and ᴱQ. tiqilin “a thaw, melting snow, slush” (QL/92). This verb for “melt” reappeared in the Early Qenya Grammar of the 1920s (PE14/58). I think it worth positing a Neo-Root √TIKW to salvage some of these early words.