correct
董 centers on the idea of correcting or setting something right, often in a supervisory or authoritative sense. The single given meaning 'correct' is the core, with a nuance of overseeing or managing to ensure correctness.
董 combines 艹 (grass) with 重 (heavy). The historical development is uncertain, but it may relate to the idea of weighing or measuring grass, which requires correctness. The modern form is used for 'correct' and 'supervise'.
Picture a heavy weight 重 pressing down on grass 艹, forcing it to stand straight and correct. The weight ensures everything is properly aligned.
For トウ, imagine a toe トウ correcting the position of the heavy weight on the grass: toe -> トウ, and the toe nudges things into the correct place.