lóng​lóng

to rumble

隆隆 lóng​lóng
to rumble adjective
a deep, heavy sound made by intense vibration, such as thunder or large machinery; to rumble; to boom
flourishing
(literary) describes a state of being prosperous or at its peak

Frequency

Movie subtitles
0.860 per million appears in 0% of films
Written text
2.75 per million

Sources