deep center

• coreCentral essential portion
• heartCirculatory system's pump
• middleCentral point or position
• nucleusCentral controlling part
• innermostMost deeply internal

profound · abyss · hub · focal · pivot · soul · essence · depths · interior · centrality · immersed · submerged · fathom · plunge · gravity · axis · root · midpoint

• outfieldcenter field, left field, right field, center fielder, left fielder