"Yobo" is a Korean word originally used as a term of endearment for one's spouse. However, it has been adopted into the English language and can be used to refer to a significant other, partner, or a loved one. While the word "yobo" is often used colloquially, there are many alternative synonyms to describe someone's significant other. These include sweetheart, lover, companion, better half, soulmate, partner, beau, girlfriend, boyfriend, spouse, and beloved. Each term conveys a sense of affection and closeness, but the specific choice of words is often determined by personal preference, cultural background, and the nature of the relationship.