Basic explanation: The original meaning is that weapons are placed in an orderly way, swords and swords are shadowed, soldiers have sufficient food and grass, and they are armed with strength, free from foreign enemies, civil strife and danger, and have inner security. Now it generally means that things are going well and according to one's wishes, such as good luck.
Synonym: auspicious
Antonym: unknown
For example: 1. Some people worry that this is an unlucky sign.
The sad news will spoil his fun.
The day when our store opened was an auspicious day.