onomatopoeia · phonetic particle; onomatopoeia

母鸡咯咯地叫。

modal particle · final particle similar to 了 le, indicating that something is obvious

既然大家都同意，那就这样咯。

verb · to cough up blood, phlegm, or other matter from the respiratory tract

他刚才咯出了一口鲜血，大家都吓坏了。