'union-busting' originates from the combination of 'union' and 'busting,' where 'union' refers to a labor union and 'busting' means breaking or disrupting.

'Union-busting' emerged as a term in the early 20th century when labor movements were gaining momentum, and employers sought to counteract union influence.

Initially, it meant 'breaking up labor unions,' and this meaning has largely remained the same in modern usage.