a shaft or pin on which something, esp a mechanized part, turns

a person or, thing, or factor that has a major or central role or, function, or effect

It was as if the pivot and pole of his life, from which he could not escape, was his mother — D H Lawrence

the person or position that a body of troops uses as a reference point when manoeuvring

to turn on a pivot, or as if on a pivot

to cause (something) to pivot

to provide (something) with a pivot or pivots

to mount (something) on a pivot

(usu + on) to depend on (something or somebody)