Translation guide
The English word 'diffuse' can be a verb meaning to spread something widely or an adjective meaning spread out or not concentrated. This guide covers both uses, with natural Japanese equivalents organized by meaning.
Expressing the action of causing something to spread out over a wide area or among many people.
The device diffuses light evenly.
The rumor was quickly diffused.
Often used for spreading information, ideas, or culture. More about dissemination than physical diffusion.
He diffused new ideas.
Means to scatter or disperse, often used for physical objects. Can imply a less uniform spread than 拡散する.
The wind diffused the petals.
Describing something that is widely spread, not focused, or lacking clarity.
The adjectival form of 拡散する, used to describe something that has been diffused.
Diffuse light filled the room.
Often used for attention, thoughts, or writing that is unfocused or rambling. Not for physical diffusion.
His explanation was diffuse.
Means vague, hazy, or indistinct. Can describe light, memories, or outlines that are not sharp.
Diffuse light came through the window.
拡散する emphasizes the physical process of spreading out in all directions, while 広める focuses on making something more widely known or accepted. Use 拡散する for gases, light, or particles; use 広める for ideas, news, or culture.
The ink diffused in the water.
She diffused the song around the world.