inconstancy
🇺🇸
/ɪnˈkɑːnstənsi/
🇬🇧
/ɪnˈkɒnstənsi/
when someone does not stay loyal or devoted to another person or to their promises
Her inconstancy in relationships made it hard for her to maintain long-term connections.
她在關係中的不穩定使她難以維持長期聯繫。