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INTERMEDIATE LEVEL
Content
dearest ☊ 
thân nhất ☊
→ → →
like: thân nhất → →
They've been best friends (= closest friends) since they were children. ☊ best ☊
My best friend has been like a sister to me (= very close). ☊ sister ☊
At one time (= at a period of time in the past) Emily was my best friend. ☊ time ☊