OBSTRUCTIVE
clogging, hindering, impeding, obstructive
(adjective) preventing movement; “the clogging crowds of revelers overflowing into the street”
Source: WordNet® 3.1
Etymology
Adjective
obstructive (comparative more obstructive, superlative most obstructive)
Causing obstructions.
• I wanted to see his report on me, but my manager was being obstructive.
Noun
obstructive (plural obstructives)
One who obstructs something.
Source: Wiktionary
Ob*struct"ive, a. Etym: [Cf.F. obstrictif.]
Definition: Tending to obstruct; presenting obstacles; hindering; causing
impediment.
– Ob*struct"ive*ly, adv.
Ob*struct"ive, n.
Definition: An obstructive person or thing.
Source: Webster’s Unabridged Dictionary 1913 Edition