perhaps = ‘excitable,’ f. stem of activ-ate (cf. separate, separable): but probably to be read as two words active able.
1602. Return fr. Parn., IV. 5 (Arb.), 62. To thinke so many actiueable wits, That might contend with proudest birds of Po, Sits now immur’d within their priuate cells. [In Hazlitt’s Dodsley spelt activable.]
