unobstructed
clear
disembarrassed
free
open
unblocked
unburdened
unchecked
unclogged
unconstrained
unembarrassed
unencumbered
unhampered
unhandicapped
unhindered
unladen
unprevented
unrestrained
unrestricted
untrammeled
foolproof
frictionless
line-of-sight
nonstop
secc
single-handed
soundproof
southward
unaided
undetectable
unfettered
unguided
unharmed
uninterrupted
unnoticeable
unobtainable
unopposed
unpopulated
unusable
valueless
acceded
beaded
ceded
conceded
deeded
exceeded
heeded
impeded
interceded
needed
pleaded
preceded
proceeded
receded
seceded
seeded
speeded
stampeded
succeeded
unheeded
unneeded
weeded