help
輔 centers on providing support or assistance, like a reinforcing part that helps something function. The core idea is help, often in a structural or complementary role.
輔 combines 車 (vehicle, cart) with 甫, which likely contributes the sound and the idea of support or reinforcement. The character originally referred to the side supports of a cart that help keep it stable.
A cart (車) needs extra support (甫) to stay steady. Think of the wooden braces on an old cart that help it carry heavy loads without breaking.
For ホ, imagine a helpful person holding (ホールド, hold) the cart steady. The 'ho' in 'hold' cues ホ, and the helper supports the cart.
vice-minister (ritsuryō system); deputy minister
vice-minister (Meiji period); undersecretary
mutual dependence
assistant vice-minister (ritsuryō system, early Meiji period)
giving the Emperor advice on affairs of state; assistance; counsel
Alcor; the Little Horseman star
aid; assistance
mutual dependence
to be mutually dependent