Heavily laden, as if to creak under the strain.
That groans.
A low sound associated with extended suffering, sorrow, and toil.
Undergoing plastic deformation before breaking.
Harsh or severe.
Difficult or demanding.
Stubborn or persistent; capable of stubbornness or persistence.
Strong and resilient; sturdy.
Difficult to cut or chew.
Rugged or physically hardy.
Rowdy or rough.
To endure.
To toughen.
Used to indicate lack of sympathy
A person who obtains things by force; a thug or bully.