To Obstruct means to deliberately prevent the progress or free movement of someone or something; it is the act of creating difficulties or blockages that hinder advancement, vision, or clear passage.
Obstruct can apply to physical impediments, like a pile of rubble blocking a road, or more abstract hindrances, such as bureaucratic processes that impede progress.
It implies a direct and often intentional interference, creating an obstacle that must be overcome or navigated around.
The intensity can vary from minor delays to complete stoppage. .
JAM DAM BAR
CLOG STOP
DAMUP DAMUP STYMY JAMUP DELAY BLOCK
OPPOSE IMPEDE STYMIE HINDER CLOGUP HAMPER
CLOSEUP TRAMMEL OCCLUDE
OBTURATE BLOCKADE
EMBARRASS STONEWALL