Concentrate and converge both draw things to one place, with a difference in what happens there. Concentrate is to gather scattered things into one dense point, or to focus. Converge is for separate paths to move toward and meet at one point. Concentrate is about density; converge is about the meeting of paths.
Both gather to a point, but concentrate is about intensity. Concentrate, from con- 'together' and centrum 'centre', packs scattered things densely into one place — light, forces, attention. Converge only brings paths to the same point; it says nothing about density. A lens concentrates sunlight into a fierce dot; roads simply converge on a town. One intensifies; the other only meets.
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.
converge
To converge is to arrive at the same place from different starting points. Crowds converge on a stadium; rivers converge below a valley; in mathematics a series converges on a limit, and in biology unrelated species converge on the same design — wings, again and again. The word's quiet power is what it implies about the destination: when independent paths keep arriving at one point, the point starts to look less like coincidence and more like truth.
| concentrate | converge | |
|---|---|---|
| Meaning | gather densely into one point; focus | move toward and meet at a point |
| Adds | density or intensity | only a meeting |
| Typically | transitive (concentrate forces) | intransitive (paths converge) |
| Often with | light, power, attention, effort | roads, rivers, opinions |
| Noun | concentration | convergence |
| Example | Concentrate the troops here. | The roads converge here. |
Ask whether it grows intense. Concentrate packs things densely — the lens gathers the light until it can burn. Converge only brings the paths to one point; nothing about it says the point grows stronger. If things are gathered and made dense or intense, that is concentrate; if paths merely meet, that is converge.
concentrate
- iThe general concentrated his forces at the river crossing.
- iiA lens concentrates the sun's rays onto a single point.
- iiiTry to concentrate your effort on the hardest questions first.
converge
- iSeveral roads converge at the market square.
- iiThe researchers' conclusions gradually converged.
- iiiProtesters converged on the parliament building.
Concentrate is usually transitive (you concentrate something) and adds density or focus; converge is intransitive (things converge) and adds only a meeting. Concentrate also means to focus the mind, a sense converge never has.