imperturbable
"easily" can be replaced with the word "readily"
stuck
The word excited is first noted in 1650s meaning "magnetically or electrically stimulated". Modern sense of the word meaning "agitated" was attested in 1855.
excited
moldable
wild
The likely word is "easily" (synonyms are simply or freely).
excited
Scarce is a six letter word for not easily obtainedA six letter word for 'not easily obtained' is scarce.
fuss
explain excited
agog