PIVOT

[noun] [C] - a fixed point supporting something which turns or balancesThe rotor blades rest on a pivot.Something which is pivotal is central and important.a pivotal figure/role/ideaA pivot can also be the central or most important person or thing in a situation.The former guerrilla leader has become the pivot on which the country's emerging political conflict turns/revolves.The film's emotional pivot is the mother's abandonment of her family.pivotal adjective