Walking; Not in a Vehicle
This page is the CodyCross answer for the clue below from Germany, Group 2200, Puzzle 2 (Quantum Theory).
Question is: Walking; Not in a Vehicle
and the answer is: ONFOOT
Word Meaning:
ON FOOT — On one's feet; walking, jogging or running but not in a vehicle or on the back of an animal.
Definitions from Wiktionary.