Concentrate and fuse both bring things to one, with a difference in what results. Concentrate is to draw scattered things together to one central point, to make something denser, or to focus — the things stay themselves, just packed close. Fuse is to join things into one by melting them together, so the seam vanishes and they become inseparable. Concentrate packs to a point; fuse melts into one.
Both gather toward one, but one densifies and the other melts. Concentrate, from centrum 'centre', draws scattered things to a central point or packs a substance denser, without making them a single new substance. Fuse, from Latin fundere 'to pour, melt', joins things by melting them together until there is no seam. Sunlight is concentrated to a point through a lens; two metals fuse into one at heat. One packs things tight at a point; the other melts them into a single mass.
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.
fuse
To fuse is to join two things into one by melting them together, so completely that the boundary is gone — metals fuse under heat, and by extension genres, ideas, and cultures fuse into something new. From the Latin fundere 'to pour or melt'. The same spelling names a very different noun: a fuse is the thin wire in a circuit that melts and breaks when the current runs too high. Where two edges coalesce under heat they fuse; unlike things that merely diverge, what is fused cannot be pulled apart.
| concentrate | fuse | |
|---|---|---|
| Meaning | gather to one point; make denser | join into one by melting; weld |
| The things | packed close, stay themselves | melt into one, seam gone |
| How | gathering, densifying | melting, with heat |
| Often with | attention, power, a solution, light | metals, genres, atoms, ideas |
| Noun | concentration | fusion |
| Example | Concentrate the light. | The metals fused. |
Ask whether things are packed tight or melted into one. Concentrate draws scattered things to a point, dense and intense, but each stays itself — light massed to a burning dot. Fuse melts the parts together until the seam is gone and they cannot be separated — two plates welded into one sheet. If things are gathered and made dense at a point, that is concentrate; if they melt into one mass, they fuse.
concentrate
- iThe lens concentrates the sunlight into one hot point.
- iiPower was concentrated in a single office.
- iiiShe concentrated her energy on the final task.
fuse
- iThe two metals fuse at a high enough temperature.
- iiThe band fuses jazz and folk into one sound.
- iiiIn the sun's core, hydrogen nuclei fuse into helium.
Concentrate packs things to a point or thickens a substance, but the parts remain what they were — a concentrated solution is still solute and solvent, just denser; fuse melts things into one inseparable mass with no seam. Both can involve intensity, but concentrate is a gathering and fuse a melding. One densifies; the other unifies for good.
A precise pair for science writing. Concentrate suits gathering to a point or increasing density — 'concentrate the solution', 'concentrate the beam' — without forming a new substance. Fuse suits a heat-driven melding into one — 'metals fuse', 'hydrogen fuses into helium'. Examiners reward the difference: concentration packs things tight, fusion melts them into one. The nouns are concentration and fusion; both are common in the sciences.