adjective. Not hindered, slowed, blocked or hampered.

adjective. Pertaining to a molecule where the reactive center is not blocked from chemical attack due to the surrounding uncreative substituents not preventing reactive agents accessing the reactive site.

adjective. not slowed or blocked or interfered with

"The Swedes added to their lead when P.J. Axelsson of the Boston Bruins swept in unhindered from the side boards to snap the puck between Luongo's legs."

hindered  

unrestrained  

hindered  

bedridden  insuperable  polyhydric  unafraid  unchallenged