(bound form) Used to represent short, crisp sounds such as laughter, a hen's cluck, or a sound from the throat.

Used at the end of a sentence to show that something is obvious or certain, similar to the use of 了 le

To use force to clear something from the throat or windpipe, such as phlegm or blood.

(bound form) Used in transliterated words, such as 吡咯 bǐ​luò