preventer

One who obstructs

A preventer is something that stops an unwanted event from occurring.

The term appears most often in compounds: crime preventer, rust preventer.

In sailing, a preventer is a line rigged to keep the boom from swinging unexpectedly during a jibe—preventing injury or damage.

The word is straightforward: one who or that which prevents.

barrier

inhibitor

Agent that slows reactions

blockerSomething that obstructs
obstacleSomething blocking the way
impedimentThing that obstructs progress

hindrance · deterrent · check · curb · brake · constraint · suppressant · antagonist · restriction · limitation

protection

shield

Handheld defensive armor

armorProtective combat covering
defenderOne who guards another
guardianProtective caretaker of another

bulwark · prophylaxis · immunity · fortification · safeguard · buffer · preservative · inoculation · vaccination · seal

nautical

backstay

Aft mast-supporting line

riggingRopes controlling ship sails
sailShip's wind-catching fabric
mastVessel's sail support

boom · gybe · line · tackle · halyard · sheet

guardian

watchdog

Guard or monitor

sentinelGuard who monitors
custodianGuardian of a place
caretakerOne who maintains property

steward · warden · overseer · conservator · chaperone · escort · protector · keeper · monitor · supervisor

Categories

nautical lineshalyard, sheet, bowline, dock line, mooring line
sailing riggingmast, boom, sail, shroud, shrouds
obstaclesbarriers, block, obstacles, barrier, blockers
downwind sailingspinnaker, dead run, jibe, gybe, bearing away
spinnaker gearspinnaker, chute, snuffer, sock, turtle

Opposites

facilitation vs. obstruction

preventerenabler

One who facilitates harmful behavior

facilitator · catalyst · promoter · encourager · helper

creation vs. destruction of conditions

preventercauser

One who produces effects

initiator · instigator · originator · creator · generator

promoting vs inhibiting

preventerpromoter

One who organizes events

catalyst · accelerator · encourager · stimulant · booster

Phrases

abuse preventionStopping mistreatment before occurs
pollution preventionStopping contaminants at origin
fire preventionStopping combustion before ignition
crime preventionStopping offenses before occurrence
foreclosure preventionStopping bank repossession
loss preventionProtecting store inventory

Family

prevent, prevented, prevention, preventing, prevents, preventive, preventative, preventable, unpreventable

Familiarity: Top 500,000
Profile: Used worldwide · Timeless · Everyday, not technical · Rated G