How does - leg contributes to the meaning of words allegation, Legacy and privilege

Leg is the Latin root word meaning law.

An allegation is a claim that someone has done something that is against the law.

A legacy is what is left behind after someone dies in accordance to the law - a gift or inheritance. Over time, we have included reputation to be included in a person's legacy.

A privilege is a right that is guaranteed by law. This has extended to not just by government law but also school law, parental law, and social law.