To throw doubt upon, cause to be distrusted; to damage in reputation is the definition of ​ (a)  

A daydream; the condition of being lost in thought is the definition of ​ ​ (a)  

To examine closely; to look over quickly but thoroughly; to analyze is the definition of ​ ​​ (a)  

To declare not guilty, free from blame, discharge completely; to conduct or behave oneself is the definition of ​ (a)  

A sorry condition or state; to pledge, promise solemnly is the definition of ​ (a)  

A bitter disagreement; fighting, struggle is the definition of ​ (a)  

To bring into existence; to be the cause of is the definition of ​ (a)  

There was a standing ​ (a)   when Mr. Sutton's mom performed the violin solo.

The students banded together to ​ (a)   Mr. Sutton when he kept freezing everyone in Gimkit.