1) Innocence 2) Perfection 1) Marian dogma 
Impeccability is the absence of sin. Christianity teaches this to be an attribute of God (logically God cannot sin, it would mean that he would act against his own will and nature) and therefore it is also commonly, but not uncontroversially, attributed to Christ. == Roman Catholic Church Teaching == === Impeccability and Heaven === Early Christia...
• (n.) the quality of being impeccable; exemption from sin, error, or offense.
Im·pec`ca·bil'i·ty noun [ Confer French impeccabilité .] The quality of being impeccable; exemption from sin, error, or offense. « Infallibility and impeccability are two of his attributes.» Pope. 
impeccable, impeccability, impecably 1. So perfect or flawless as to be beyond criticism. 2. So perfect in character as to be incapable of sinning.
noun the quality of being exempt from sin or incapable of sinning