paw
踶 centers on the paw of an animal, specifically the foot or lower leg part that touches the ground.
踶 combines 足 (foot) with 是, which likely contributes the sound. The character is associated with the paw or foot of an animal, but the exact historical development is uncertain.
The left side 足 means foot, and the right side 是 looks like a paw with claws or toes. Picture an animal's paw pressing firmly on the ground.
For テイ, imagine a paw gently tapping the ground: tap -> テイ, and the paw leaves a small print.