Quenya 

hilcin

it freezes

hilcin ("k")vb., glossed "it freezes" (LT1:254); if this word is to be adapted to LotR-style Quenya, it would have to mean "I freeze", but the shape of this word seems somewhat alien to Tolkien's later forms of Quenya (verbs with 1st person aorists in -in never have a consonant cluster immediately preceding this ending)