n.
  - a remark expressing an opinion or reaction. 
▸discussion, especially of a critical nature.
 - an explanatory note in a text. 
▸archaic a written explanation or commentary.
 
v.
 express an opinion or reaction.
 
  Derivative
  
  Etymology
  ME: from L. commentum ‘contrivance’ (in late L. also ‘interpretation’), neut. past part. of comminisci ‘devise’.