Hope and life are represented by this symbol.
The letters Chet and Yud are combined to form the chai sign. The origins of this sign can be traced back to the eighteenth century. It’s commonly worn around the neck as a medallion. The plural version of chai is chaim. “L’chaim!” means “to life,” and is commonly used as a toast at weddings and other events. It represents the worth of life and the hope that underpins it. The letters in chai sum up to 18, hence 18 is considered a lucky number in numerology.