lignify

To turn into wood or become woody through the formation and deposit of lignin in cell walls.

To make woody or woodlike by the deposit of lignin.

To convert into or become wood; make or grow woody.

To become wood.

To convert into wood or into a ligneous substance.

To become wood.

, (botany): To develop woody tissue as a result of incrustation of lignin during secondary growth.

, (by extension): To become rigid or fixed, like something made of wood.

To turn into wood; to make ligneous.

convert into wood or cause to become woody