Open

apertus

(not closed)

apertus

(prepared to conduct business)

apertus

(receptive)

apertus

(public)

patens

(extended, exposed <-- possibly applies to sense now worded as "Not physically drawn together, folded or contracted". -->)

aperio

(to make something accessible)

aperio

(to make accessible to customers)

aperio

(to bring up (a topic))

aperio

(to become open)

aperiō

(to begin conducting business)