朗朗上口

to flow right off the tongue (of lyrics or poetry) / to recite with ease / catchy (of a song)

clear / bright

used in 上聲|上声[shang3 sheng1]

(bound form) up; upper; above; previous / first (of multiple parts) / to climb; to get onto; to go up / to attend (class or university) / (directional complement) up / (noun suffix) on; above

to be able to read aloud fluently / to be suitable (easy enough) for reading aloud

mouth / classifier for things with mouths (people, domestic animals, cannons, wells etc) / classifier for bites or mouthfuls