Concentrate and disperse are opposites. Concentrate is to draw scattered things together to one central point, to make something denser, or to focus. Disperse is to spread a gathered crowd, substance or mass out over a wide area until it thins. Concentrate gathers to a centre; disperse spreads out wide.
One pulls things inward to a point; the other pushes them outward across an area. Concentrate, from com- 'together' and centrum 'centre', draws scattered things to one central point, or packs a substance denser. Disperse, from dis- 'apart' and spargere 'to scatter', takes a mass in one place and spreads it thin. A lens concentrates sunlight to a burning point; wind disperses a head of seeds across a field. One intensifies by gathering; the other weakens by spreading.
concentrate
To concentrate is to gather toward one centre until it is strong — from the Latin com- 'together' and centrum 'centre'. Scattered forces concentrate at a border; a reader concentrates on a page, pulling stray attention to one point; boiling concentrates a juice by driving off its water. As a noun, a concentrate is what is left when the water is gone: the same substance, no longer spread thin. To consolidate holdings is close, but concentrate keeps the sense of intensity growing as things gather.
disperse
To disperse is to break up a gathering and spread it out until it thins away — movement from concentration to diffusion. A crowd disperses when a concert ends; wind disperses seeds and smoke; light disperses through a prism. The word works both ways — things disperse on their own or are dispersed by some force — but it leans toward an even, gradual spreading that often fades to nothing, rather than a sudden, random fling. What was massed in one place ends up thinly distributed across many.
| concentrate | disperse | |
|---|---|---|
| Meaning | gather to one point; make denser | spread out over a wide area |
| Direction | inward, to a centre | outward, over an area |
| Effect | intensifies, thickens | thins, weakens |
| Often with | attention, power, forces, a solution | crowds, smoke, seeds, light |
| Noun | concentration | dispersal / dispersion |
| Example | Concentrate the light. | The crowd dispersed. |
Ask which way things move — to a point or over an area. Concentrate draws scattered things inward to one centre, making them denser or fiercer — light pulled to a burning dot. Disperse drives one gathering outward until it is spread thin — a dandelion head flung the width of a field. If things gather to a point, that is concentrate; if a gathering spreads out wide, that is disperse.
concentrate
- iThe lens concentrates the sunlight into one hot point.
- iiWealth became concentrated in a few hands.
- iiiEfforts were concentrated on the worst-hit areas.
disperse
- iPolice moved in to disperse the crowd before nightfall.
- iiThe morning wind dispersed the last of the smoke.
- iiiWind and birds disperse the seeds far from the parent plant.
Concentrate gathers to a centre and intensifies; disperse spreads over an area and thins. In chemistry they are near-mirror terms — a solution is concentrated (made stronger) or dispersed (spread through a medium) — and in ordinary use, forces or attention can be concentrated or dispersed. One makes strong at a point; the other weak across a space.
A high-value pair for science, geography and strategy essays. Concentrate suits gathering to a point or increasing density — 'concentrate resources', 'a concentrated solution', 'population concentrated in cities'. Disperse suits spreading out — 'disperse the crowd', 'seeds dispersed by wind', 'dispersed settlement'. Examiners reward the contrast: concentration for density at a point, dispersal for a wide spread. The nouns are concentration and dispersal (or, technically, dispersion).