A thing not made by nature

(a)  

To join or work together.

(a)  

To give or devote one's time.

(a)  

To be able to bend without breaking.

(a)  

A tool or object's use or purpose.

(a)  

To imitate or copy something's appearance or behavior.

(a)  

To stand in the way or block progress.

(a)  

A special way of doing something to achieve a desired result.

(a)