jackhammer

Definitions

1. A portable percussive power tool that combines a hammer and chisel used to drill or break hard matter, for instance rock or concrete.
2. Something that is very strong but also very rigid.
   figuratively

Equivalents

Examples

“A new skiercross pro tour is on the docket, as well as freeskiing. Just like⟳ racing, both require⟳ strong but supple legs rather than jackhammer quads.”

CEFR level