Another link post.
독 means poison & venom
해진 means being, or becoming
–> 독해진 = ‘being a poison, becoming a poison, getting poisonous.’
Usually 독해진 is used for a character or personality of the human when the human is firm and stronger: potent, pungent, spiteful, venomous, dogged, firm etc.
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PS: Kan [blonde hair] does look like Kim JaeJoong.