nimblest

adjective
  1. 1

    Adept at taking or grasping

    โ€œnimble fingersโ€

  2. 2

    Quick and light in movement or action.

    โ€œHe was too nimble for the assailant and easily escaped his grasp.โ€

  3. 3

    Quick-witted and alert.

    โ€œShe has a nimble mind and can improvise in any situation.โ€

Antonyms

Source: https://en.wiktionary.org/wiki/nimble, https://en.wiktionary.org/wiki/nimblest