How do you say “momentous” in Vietnamese?

Vietnamese words for “momentous”

• trọng yếuListenadjective
  Hanoi [t͡ɕawŋ͡m˧˨ʔ ʔiəw˧˦] · Saigon [ʈawŋ͡m˨˩˨ ʔiw˦˥]trọng heavy yếu rising

  important; vital

  for “momentous” meaning: Outstanding in importance, of great consequence.

• quan trọngListenadjective
  Hanoi [kwaːn˧˧ t͡ɕawŋ͡m˧˨ʔ] · Saigon [waːŋ˧˧ ʈawŋ͡m˨˩˨]quan level trọng heavy

  important; significant

  for “momentous” meaning: Outstanding in importance, of great consequence.