from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Not hindered, slowed, blocked or hampered.
- adj. 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.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. not slowed or blocked or interfered with
un- + hindered (Wiktionary)