to cease to feel a sense of loyalty (or gratitude etc) to sb or sth
to fall out of love with sb
Definitions (CC-CANTO)
(verb) The Love to someone is change
Definitions (粵典–words.hk)
動詞
一對情侶嘅其中一方鍾意咗第二個人 to be no longer faithful or loyal to sby's lover; to transfer sby's affection to another; to break faith
佢既然已經變咗心,我留佢喺身邊都冇意思啦。
佢既然已经变咗心,我留佢喺身边都冇意思啦。
keoi5 gei3 jin4 ji5 ging1 bin3 zo2 sam1, ngo5 lau4 keoi5 hai2 san1 bin1 dou1 mou5 ji3 si1 laa1. Since he already likes someone else, there is no point of me forcing him to stay with me.
Definitions (Wiktionary)
verb, intransitive, verb-object
to cease to be faithful (syn.) 走心, 反心