verb
insist
in-SIST/ɪnˈsɪst/
To maintain a demand or position firmly against resistance.
The woman insists on returning the cracked teapot, gesturing firmly across the shop counter.

Etymology
“Taking a stand upon” something connects physical firmness with firmness of purpose. The Latin verb already meant to press vigorously or urge, linking that stance to a forceful demand or assertion.
In context
to demand a ceasefire and to insist that this death and devastation is not in our name. Silence is implied consent.
More examples
- Despite the evidence, he insists that he is right.
- I insist that you return the money today.
- They insisted on a refund after the store offered only credit.
Forms
insist · insists · insisted · insisting
insistence noun — Firm repetition of a demand or position.
insistent adjective — Firmly maintaining a demand despite opposition.