風邪(かぜ) kazeが ga治(なお)ら()な()い()ん()で()す() naoranaindesu。 I can't get over this cold. Literal Cold [subject-が] won't-heal [explanatory-んです]. 治らないんです uses explanatory んです: 'the thing is, it won't heal.' 治る is the intransitive 'to heal/get better.' healthillness/cold~のだ / ~のです (explanatory)
風邪(かぜ) kazeが ga治(なお)ら()な()い()ん()で()す() naoranaindesu。 I can't get over this cold. Literal Cold [subject-が] won't-heal [explanatory-んです]. 治らないんです uses explanatory んです: 'the thing is, it won't heal.' 治る is the intransitive 'to heal/get better.' healthillness/cold~のだ / ~のです (explanatory)