From a (as a negative particle) and a presumed derivative of a compound of ek and a derivative of ichnos; not tracked out, i.e. (by implication) untraceable -- past finding out; unsearchable.
see GREEK a
see GREEK ek
see GREEK ichnos
ἀνεξιχνίαστοι (anexichniastoi) − 1 Occurrence
ἀνεξιχνίαστον (anexichniaston) − 1 Occurrence