gầm

gầm
verb
  1. to roar

noun
  1. the space under beds or cabinets; the underneath

ngầm

ngầm
adj
  1. beneath the surface (underground; subterranean, underwater; subaquatic)
  2. (figuratively) secret; covert; unspoken

吟

吟
character
  1. chữ Hán form of ngâm (“to recite; to read in a singing voice”).