buckling
buck-ling
noun
The act or result of bending, crumpling, or collapsing under pressure or stress.
"Engineers checked for signs of buckling."
verb
The action of bending, crumpling, or collapsing under pressure; giving way.
"The old floorboards were buckling."
Thesaurus
Synonyms: buckle, warp, crumple, heave, clasp
Antonyms: unbuckle