Pronunciation: [ɹˈʌn ˈa͡ʊt ˈɒn] (IPA) 
The phrase "run out on" is spelled with the letter "o" in both "run" and "out." The sound of the vowel "o" in "run" is represented by the IPA phonetic symbol /ʌ/ which is pronounced with the tongue in a neutral position. The sound of the vowel "o" in "out" is represented by the IPA symbol /aʊ/, which is pronounced with the mouth open and rounded. This phrase means to abandon or desert someone or something suddenly.
The phrase "run out on" is an idiomatic expression typically used to denote the act of abruptly abandoning or deserting someone or something, often without any warning or explanation. It implies a sudden and unexpected departure or withdrawal from a commitment, responsibility, or relationship. It usually carries a negative connotation, suggesting a lack of loyalty, reliability, or integrity.
When applied to interpersonal relationships, "run out on" refers to the act of leaving a partner, friend, or family member in a situation where they are left feeling abandoned, betrayed, or let down. It conveys a sense of disregard for the feelings or well-being of the person being left behind. This phrase can be associated with emotional or physical abandonment, where a person abruptly terminates a relationship, avoids or evades their responsibilities, or fails to provide the expected support.
In a broader sense, "run out on" can also describe situations where someone abandons their duties, obligations, or commitments. It can be used to portray instances where individuals walk away from their job, team, or project, leaving others to bear the consequences or pick up the pieces. This phrase signifies a lack of dedication, reliability, or perseverance.
Overall, "run out on" encapsulates the act of suddenly and irresponsibly departing from a person, responsibility, or commitment, reflecting a behavior characterized by abandonment, disloyalty, and disregard.
