Quenya 

hlar-

verb. hear

hlar- verb "hear", future tense hlaruva "shall hear" in Markirya. Since the original root is SLAS, this verb may have the past tense *hlassë (for slansē) in more classical forms of Quenya, perhaps re-formed as *hlarnë (or *hlarrë, for hlazze) in spoken Noldorin Quenya. Compare #hriz- "snow" (root SRIS) with past tense hrinsë/hrissë, as well as Tolkien's remarks in PE19:99.