IPA: /dɪˈfjuzər/
KK: /dɪˈfjuːzər/
A device that spreads out or scatters something, such as sound, light, or liquid, to create a more even effect.
The diffuser helped to soften the harsh light in the photography studio.
Diffuser → It is formed from "dis-" (meaning apart) and "fundere" (meaning to pour). The word describes something that pours or spreads something apart, such as a scent or light.
Think of something that 'spreads apart' ('dis-') by 'pouring' ('fundere') — that's why a diffuser spreads scents or light.