Frontier - an undeveloped area of examine; a topic inviting investigation and development; "he labored at the frontier of brain science" In Roman mythology, Disciplina was a insignificant deity as well as personification of self-discipline.[one] The phrase disciplina by itself, a Latin noun, is multi-faceted in which means; it refers https://www.youtube.com/watch?v=adX5OqFQ6Bg