ex ‧ cit ‧ a ‧ ble /ɪkˈsaɪtəb ə l/ BrE AmE adjective
[ Word Family: adjective : ↑ excitable , ↑ excited , ↑ exciting ≠ ↑ unexciting , ↑ excitable ; noun : ↑ excitement , ↑ excitability ; adverb : ↑ excitedly , ↑ excitingly ; verb : ↑ excite ]
becoming excited too easily:
A puppy is naturally affectionate and excitable.
—excitability /ɪkˌsaɪtəˈbɪləti, ɪkˌsaɪtəˈbɪlɪti/ noun [uncountable]