inconstant
🇺🇸
/ɪnˈkɑːnstənt/
🇬🇧
/ɪnˈkɒnstənt/
not staying loyal or faithful
His inconstant behavior made it hard to trust him.
他不穩定的行為讓人很難信任他。
changing often
The weather was inconstant, with rain one moment and sunshine the next.
天氣變化無常,忽雨忽晴。