rearing from infancy; raising from a young age
Focuses on the act of raising a person or animal from a very young age, often implying a long-term, formative relationship.
He passed on all the secret techniques to his disciple, whom he had raised from a young age.
training from an early age; grooming from childhood
Emphasizes systematic training or education of a subordinate, apprentice, or protégé from an early stage, often in a professional or organizational context.
A dog raised from puppyhood becomes very attached to its owner.
That politician positioned his long-time aide, whom he had groomed from early on, as the next candidate.
The president appointed an employee he had trained from the beginning as the head of the new division.
Compound of 子 (child) and 飼い (raising, keeping), the continuative form of 飼う (to raise, to keep). The literal meaning is 'child-raising', extended to the figurative sense of training a person from a young age.