FreeVocabulary
Restive
/ˈrɛstɪv/ adjective hardUnable to stay calm or still, especially out of impatience or resistance to being controlled.
The horses grew restive as the thunder rolled closer, stamping and pulling at their reins.
Memory Trick
Restive looks like it should mean 'wanting rest,' but it means the opposite -- that very trap is the memory hook, since restive animals refuse to settle down.