friendship, intimacy
誼 centers on a close, warm bond between people: friendship and intimacy. It describes a relationship built on mutual trust and affection.
誼 combines 言 (speech) with 宜, which likely contributes both sound and the idea of what is proper or fitting. Together they suggest words that build proper, fitting relationships—friendship and intimacy.
Words (言) that are proper and fitting (宜) create friendship. Imagine two people speaking kindly and appropriately to each other, building a close bond.
For ギ, picture giving a gift to a close friend: gift -> ギ, and the gift strengthens your friendship.