Pronunciation: [bˈad blˈʌd] (IPA) 
The phrase "bad blood" is often used to describe a long-standing feud or animosity between people. The spelling of this phrase is straightforward, with each word representing its phonetic sound. "Bad" is spelled with a short 'a' and a voiced 'd' sound. The second word, "blood," is spelled with a voiced 'b' sound, a short 'u' sound, and a voiced 'd' sound. Together, the phrase is pronounced /bæd blʌd/ in IPA phonetic transcription.
Bad blood is an idiomatic expression that refers to a deep-seated animosity, resentment, or hostility between individuals or groups. It represents a state of intense dislike or ill feeling that has persisted and grown over time, often arising from past disagreements, conflicts, or personal rivalries. The term "bad blood" implies a toxic, unhealthy, or negative relationship characterized by bitterness and a lack of trust.
This phrase can be used to describe a variety of situations, such as ongoing feuds between family members, colleagues who maintain a hostile working environment, or rival factions within a community or organization. It suggests a level of tension and antagonism that hinders effective communication, cooperation, or reconciliation.
The existence of bad blood can have detrimental effects on personal relationships, professional collaborations, or social dynamics. It can cause individuals to hold grudges, harbor resentment, or seek opportunities for revenge, thereby perpetuating the cycle of conflict. Resolving bad blood often requires open communication, forgiveness, and a willingness to let go of past grievances.
In summary, bad blood embodies a deep-rooted animosity that has developed over time, signifying a strained or hostile relationship. Its negative connotations highlight the detrimental impact such animosities can have on personal, professional, or societal interactions.
The phrase "bad blood" first emerged in the late 16th century and has its roots in ancient beliefs about blood and its connection to temperament, personality, and health. In medieval and early modern times, the concept of "humors" prevailed, which involved the belief that an individual's health and temperament were influenced by the balance of four bodily fluids or "humors": blood, phlegm, yellow bile, and black bile.
"Bad blood" specifically refers to the notion that an imbalance or impurity in a person's blood could cause physical and psychological disorders, or lead to a hostile or antagonistic attitude. This understanding of "bad blood" evolved metaphorically over time, extending to personal animosities, grudges, and conflicts between individuals or groups. Even though the literal medical aspect of the phrase has faded into obscurity, the figurative usage remains in common use today.
