'

hear it 
A sound we use in English, but don't consider a sound. It's the catch in the throat we put in the beginnings of words that start with vowels, or in phrases like "uh-oh". In Klingon, it can also come at the ends of syllables, where it has to be pronounced carefully (e.g. the words tI and tI' have very different meanings). This one takes practice to get right in all positions.