Something That Blocks or Impedes Progress
This page is the CodyCross answer for the clue below from Train Travel, Group 718, Puzzle 1 (Boarding Time).
Question is: Something That Blocks or Impedes Progress
and the answer is: OBSTACLE
Word Meaning:
OBSTACLE — Something that impedes, stands in the way of, or holds up progress, either physically or figuratively
Definitions from Wiktionary.