"to follow up," is used of investigating or "tracing" a course of events, Luke 1:3 , where the writer, humbly differentiating himself from those who possessed an essential apostolic qualification, declares that he "traced the course of all things" (RV) about which he was writing (AV, "having had ... understanding, etc."). See FOLLOW , No. 5.
signifies "that cannot be traced out" (a, negative, ex, for ek, "out," ichnos, "a track"), is rendered "past tracing out" in Romans 11:33 , RV (AV, "past finding out"); in Ephesians 3:8 , "unsearchable." See FIND , Note (3), UNSEARCHABLE. In the Sept., Job 5:9; 9:10; 34:24 .