halla is an adjective meaning "tall" in Quenya.
is also the name in Quenya of a letter that was originally used to represent "breath" H
. It might be placed before a consonant to indicated that it was unvoiced and breathed, such as expressing voiceless l
. Over time though the letter Harma
, when used at the beginning of a word, came to represent "breath" h
(and is then called Aha