To walk quietly with only the tips of the toes touching the ground.
Standing elevated, on or as if on the tips of one's toes.
Moving carefully, quietly, warily or stealthily, on or as if on the tips of one's toes.
The tip of the toe.
To walk wearily with heavy, slow steps.
To trudge along or over a route etc.
A tramp, i.e. a long and tiring walk.