retards

Impedes forward progress

Retards as a verb means slows or delays: Friction retards motion.

As a noun, retards was once clinical terminology for people with intellectual disabilities but became a slur and is now widely condemned.

The noun usage is offensive regardless of intent.

delay

slows

Decreases in speed

hampers · stymies · decelerates · postpones · defers · stalls · suspends · detains · protracts · brakes

slur

offensive

Causing displeasure or attack-oriented

demeaning · disparaging · insulting · hurtful · disrespectful · discriminatory · bigoted · prejudiced · ableist · hateful

Categories
Opposites
speed/rate of progress

retardsaccelerates

Increases in velocity

hastens · speeds up · quickens · expedites · rushes

developmental effect

retardsadvances

Forward movements or progress

promotes · furthers · facilitates · fosters · encourages

Phrases
Family

retard, retarded, retarding, retardant, retardants, retardation

Familiarity
Top 200,000
Profile
Used worldwide · Timeless · Negative · Everyday, not technical · Rated PG-13