1) Faultless 2) Not defectible 
• (a.) Not defectible; unfailing; not liable to defect, failure, or decay.
In`de·fect'i·ble adjective [ Prefix in- not + defectible : confer French indéfectible .] Not defectible; unfailing; not liable to defect, failure, or decay. « An indefectible treasure in the heavens.» Barrow. « A state of indefectible ...
not defectible; not liable to defect or failure. · not liable to fault or imperfection; faultless.