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string someone along
string someone along [idiom]
To deliberately deceive someone about your plans or intentions over a period of time; to make someone believe something while you know for a fact that you are misleading them and giving them false hopes about that thing
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فریب دادن کسی، کسی را به بازی گرفتن، سر کار گذاشتن
Example:
Can’t you see he has strung you around? There is no pay raise or promotion and he only wants you to do all his duties to go on holiday freely.