Select the option that can be used as a one-word substitute for the given group of words.
To walk aimlessly

To find the correct one-word substitute for the phrase "To walk aimlessly", let us analyze the definitions of all the given options:

1. Amble: To walk or move at a slow, relaxed, or leisurely pace, often without a definite route or destination (aimlessly).
2. Crawl: To move forward on the hands and knees or by dragging the body close to the ground.
3. Sprint: To run at full speed over a short distance.
4. Slither: To move smoothly over a surface with a twisting or oscillating motion, typically like a snake.

Comparing the definitions, the word that perfectly matches "To walk aimlessly" (or walking in a slow, relaxed, and leisurely manner) is Amble.

Therefore, the correct option is Amble.