1. Preventing movement
   - clogging, hindering, obstructive

1. Be a hindrance or obstacle to
   "She is impeding the progress of our project"
   - hinder 
2. Block passage through
   - obstruct, obturate, occlude, jam, block, close up

See also: impediment, preventative, preventive

Type of: keep, prevent

• slab
• slabber
• slabbing
• slack
• slack off
• slack suit
• slack tide
• slack up
• slack water
• slacken
• slacken off
• slackening
• slacker
• slacking
• slackly
• slackness
• slacks
• slag
• slag code
• slag off
• slagheap
• slain
• slake
• slaked
• slaked lime