Hard-bitten and Tough nut to crack

Hard-bitten adjective - Able to withstand hardship, strain, or exposure.

Tough nut to crack and hard-bitten are semantically related. In some cases you can use "Tough nut to crack" instead an adjective phrase "Hard-bitten".

Hard-bitten and tough nut to crack are semantically related. Sometimes you can use "Hard-bitten" instead an adjective phrase "Tough nut to crack".