As I investigated this word its usage in the NT I am more and more convinced of its key importance for apologetics.
This is how I would translate the definition of Faith from Heb 11vs1:
Faith is the firm basis for hope
Faith is the rebuke from the unseen world.
The rebuke from an unseen world which faith embraces is manifest in the conscience as an awareness of right/wrong.
An awareness that I am personally committed to the wrong and therefore I am under right rebuke and am worthy of judgement by the maker of conscience.