HSK 7-9
留恋
liúliàn动
reluctant to leave; to hate to have to go; to recall fondly
毕业时大家都很留恋校园生活。
Bìyè shí dàjiā dōu hěn liúliàn xiàoyuánshēnghuó.
At graduation, everyone was reluctant to leave campus life behind.
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Appears across levels (7-9) in the HSK 3.0 word list.