I think is love:
Noun: Love grows old.Verb: She loves him.Adjective: The love birds have disappeared.Pronoun: Give me the drink, love.
I'm pretty sure it is Theme.
Theme is the central topic of the text. passage, story, or anything else. So it may possibly also be the same for the underlying meaning and universal truth...but again, I am not sure.
Relating to the business of running an organization, or government.