undetermined, open, subject, overt, accept, pervious, quick, opened, acceptive, unfastened, admissive, wise, tolerant, enterprising, clear-sighted, undefendable, centripetal, loose, liberal, bright, unresolved, brilliant, clear, discerning, open to, afferent, undecided, candid, capable, hospitable, heart-to-heart, assailable, live and let live, exposed, open-minded, smart, intelligent, academic, acceptant, able, responsive, undefended, have/keep an open mind, broad-minded, sensory
responsive (part of speech: adjective)
willing (part of speech: adjective)
ductile, ready, plastic, earnest, acquiescent, pliable, malleable, eager, biddable, assenting, tractable, susceptible, pliant, yielding, agreeable, compliant, flexible, cooperative, submissive, willing, tame, amenable, adaptable, persuadable
- To the receptive mind all our ancient cathedrals, and a few of our modern ones, possess a subtle atmosphere of their own, indescribable but plainly felt, both within and without their walls. - "Winchester", Sidney Heath.
- Scarborough looked receptive, but not enthusiastic. - "The Second Generation", David Graham Phillips.
- There they all are, ready to be thrilled, eager to be worked upon, deliberately putting themselves into that glorious, rare, receptive mood when they are clay in the artist's hand- and Lord! - "The Haunted Bookshop", Christopher Morley.