Glottal Consonants

Glottal consonants are consonants that are articulated by the vocal cords only, without blocking the air in the mouth. Glottal consonants don't have a separation between their manner of articulation and phonation, and they are actually non-syllabic phonations that come before or after vowels. They are commonly difficult to pronounce without vowels since they can't be pronounced with an airflow obstruction in the mouth, they need the mouth to be really open.

Glottal Consonants in Orish
In Orish, the sound of the letter H is the only glottal consonant, the glottal fricative. This sound is actually a breathy voice that comes before or after a vowel.