IPA: /kənˈdɛnsər/
KK: /kənˈdɛnsər/
A device or tool that gathers and directs light, or an apparatus that changes vapor into liquid.
The photographer used a condenser to focus the light on the subject.
Condenser → It is formed from "con-" (meaning together) and "densus" (meaning thick or dense). The word "condenser" refers to a device that makes a gas or vapor denser by cooling it, thus bringing particles together.
Think of bringing things 'together' ('con-') to make them 'thicker' or 'denser' — that's what a condenser does.