monkeyish

/ˈmʌŋkiɪʃ/
adjective
  1. Resembling or characteristic of a monkey, especially in being mischievous, playful, or restless.
    • His monkeyish grin appeared just before he hid the remote control.
    • The puppy's monkeyish energy made it hard to keep him still.
    • The toddler's monkeyish antics kept everyone laughing at the party.
Antonyms