12-Letter Words Containing: P,L,E,B,E,I,A,N

• incapable of being explained or accounted for

• incapable of being overcome, challenged or refuted

• difficult or impossible to evaluate with precision

• a factor whose effects cannot be accurately assessed

• not admitting of penetration or passage into or through

• permitting little if any light to pass through because of denseness of matter

• impossible to understand

• not capable of being separated