Disperse and intersect are opposites in direction. Disperse is to spread a gathered crowd, substance or mass out over a wide area until it thins. Intersect is to cross at a point and continue, or to have a point in common. Disperse spreads things out wide; intersect brings two paths to a shared point.
One spreads a gathering out over an area; the other brings two paths to a shared point. Disperse, from dis- 'apart' and spargere 'to scatter', spreads a gathered mass out wide. Intersect, from inter- 'between' and secare 'to cut', means two things cross and share a point, then continue. Wind disperses the seeds across the field; two roads intersect at a junction. One thins out everywhere; the other meets at one point.
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.
intersect
To intersect is for two lines, roads, or paths to cross each other at a point and carry on past it — from the Latin inter- 'between' and secare 'to cut', literally to cut between. Where roads intersect there is a junction; where two sets intersect there are the members they share. The word runs figuratively too: two fields of study intersect where their concerns overlap. Unlike paths that meet and stop, intersecting lines cross and keep going, then diverge again beyond the point.
| disperse | intersect | |
|---|---|---|
| Meaning | spread out over a wide area | cross at a point and continue |
| Direction | outward, over an area | two paths to a shared point |
| The result | a wide, thin spread | a crossing point |
| Often with | crowds, smoke, seeds, light | roads, lines, sets, disciplines |
| Noun | dispersal / dispersion | intersection |
| Example | The crowd dispersed. | The roads intersect. |
Ask whether a gathering spreads wide or two paths meet at a point. Disperse spreads a mass out over a wide area — a dandelion head flung the width of a field. Intersect brings two paths to one shared point, then each carries on — two roads at a junction. If a gathering spreads out across space, that is disperse; if two paths cross at a shared point, they intersect.
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.
intersect
- iThe two roads intersect at the edge of town.
- iiTheir research interests intersect at climate policy.
- iiiThe line intersects the circle at two points.
Disperse spreads many things out over a wide area; intersect brings two paths to a single shared point. They oppose in direction — outward over an area versus toward one point — though intersect leaves the two paths intact while disperse thins a gathering out.