strong
腯 centers on physical strength and robustness, describing a body that is sturdy and powerful.
腯 combines the flesh radical ⺼ with 盾, which likely contributes the sound. The exact historical development is uncertain, but the character is associated with strong, sturdy flesh.
The flesh radical ⺼ beside 盾 (shield) suggests a body as strong as a shield. Picture a warrior whose flesh is so tough it acts like a shield, making them incredibly strong.
For トツ, imagine a strong person flexing and making a sharp 'tots!' sound as their muscles bulge. The sound 'tots' cues トツ while the body shows its strength.