v. support physically; prop up; support something or someone by supplying evidence
The attorney came up with several far-fetched arguments in a vain attempt to buttress his weak case.
Sentence in Classic:
I think I was glad to know it; I think I was glad to have my better impulses thus buttressed and guarded by the terrors of the scaffold.
Dr. Jekyll and Mr. Hyde By Robert Louis Stevenson Context
This barricade, constructed as it was and admirably buttressed, was really one of those situations where a handful of men hold a legion in check.
Les Misérables (V5) By Victor Hugo Context
The wall is of immense thickness, and is propped or defended by six huge external buttresses which project from the circle, and rise up against the sides of the tower as if to strengthen or to support it.