Eternal sin
Thomas Aquinas lists, or has responded to, six sins that supposedly go against the Holy Spirit:
Thomas Aquinas explains that the unforgivability of blasphemy against the Holy Spirit means that it removes the entrance to these means of salvation; however, it cannot hinder God in taking away this obstacle by way of a miracle.
Sloth (deadly sin)
Sloth is one of the seven capital sins. It is the most difficult sin to define, and to credit as sin, since it refers to a peculiar jumble of notions, dating from antiquity and including mental, spiritual, pathological, and physical states. One definition is: a habitual disinclination to exertion, or laziness.