obedient, united
叒 centers on harmony through yielding: being obedient and united, as if multiple parts act as one by following a shared direction.
叒 is a rare character composed of three 又 (hand) elements stacked. The exact historical development is uncertain, but the repetition likely reinforces the idea of multiple hands working together in obedience or unity.
Three hands (又) stacked together: the top hand leads, and the bottom pair (双) follows obediently, united as one.
For ニャク, imagine a cat's obedient meow: 'nyaa' (ニャ) followed by a quick 'ku' (ク) when it follows a command. The sound 'nyaku' cues ニャク while the cat's obedience fits the meaning.