tenacious
adjective
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sticking togetherβThey made a tenacious pair.βcoherent
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good at rememberingβMy memory is tenacious, so don't try and fool me.βlong
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stubbornly unyieldingβThe students responses were so tenacious, that they often landed them in trouble at school.βpersistentdourunyieldingdoggedpertinacious