intentive

adjective3

1. •
   Paying attention; attentive, heedful.

   • the object is fine and accurate , it conduceth much to have the sense intentive and erect — 1627
2. •
   Intent (of the mind, thoughts etc.).

   • To which whilest she lent her intentive mind, / He suddenly his net upon her threw […] — 1596
3. •
   Expressing intent.