-ive       
suffix uk/ -ɪv/ us/ -ɪv/ (also -ative); (also -itive); (also -tive)
 (加在动词后构成形容词)有…作用的,有…性质的
added to verbs to form adjectives meaning showing the ability to perform the activity represented by the verb
  imaginative 有想象力的 
 descriptive 描述性的