degrees harder - hardest
conjugation hardening - hardened - hardened
adjective: solid, firm, and resistant to pressure
The wood is hard and durable, making it ideal for furniture.
adjective: difficult to bear, endure or deal with
She's going through a hard time after her loss.
adjective: requiring great mental effort; difficult to understand or solve
The final exam was incredibly hard.
adjective: unyielding or inflexible in attitude or character
She is hard when it comes to negotiating contracts, never giving in easily.
adverb: with a great deal of effort or force
She worked hard to achieve her goals.