to be obstructed; to be hindered

to hinder; to block; to obstruct

(literary) long and arduous (road)

to block; to prevent by force

to block; to obstruct

to obstruct; to hamper; (medicine) obstruction

electrical resistance; resistor

magnetic reluctance

to stop; to contain; to deter

dangerous and difficult (path)

air resistance; aerodynamic drag

bias impedance (electronics)

untold dangers and difficulties (idiom)

unobstructed passage; to go through unhindered

regardless of weather conditions; rain, hail or shine