GEOLOGY

Detailed explanation-1: -to be defeated by a difficult situation: But these were difficult times and a lesser man would have buckled under the strain. There are signs that she is starting to buckle under the pressure.

Detailed explanation-2: -Bending is a state of stress while buckling is the state of instability. Bending always occurs in flexural members like beam and slabs, while column mostly faces buckling behaviour because, upon axial loads on the column, the column becomes unstable due to greater load.

Detailed explanation-3: -From Longman Dictionary of Contemporary Englishbuck‧le1 /ˈbʌkəl/ verb 1 bend [intransitive, transitive] to become bent or curved because of heat or pressure, or to make something bend or curve in this way The steel pillars began to buckle.

Detailed explanation-4: -phrasal verb. If you buckle under to a person or a situation, you do what they want you to do, even though you do not want to do it.