The "mere exposure effect" — a psychological phenomenon where people develop a preference for things simply because they are familiar with them. The more you …

The domino effect — a chain reaction where one event triggers a series of similar or related events. Used in politics, economics, and everyday speech.

The yo-yo effect — most commonly used in the context of dieting, where weight lost is quickly regained, creating a cycle of loss and gain. Also used for any …

The butterfly effect — the idea from chaos theory that a small action (a butterfly flapping its wings) can have large, unpredictable consequences far away. …

A side effect — an unintended consequence of an action, medication, or decision. Used in medicine, science, and everyday speech.

Literally "Egyptian darkness." Refers to total, impenetrable darkness — physical or metaphorical. Comes from the biblical plague of darkness sent upon Egypt. …

A thought experiment — an imagined scenario used to explore ideas, test theories, or reason through problems without physical experimentation. Common in …

Literally "elixir of life." Refers to a mythical potion granting eternal life or youth, but used figuratively for anything that gives energy, vitality, or a …

Literally "emotions like at a mushroom-picking outing." Describes a situation full of excitement, unpredictability, and mixed feelings — you never know what …

From French — "facing forward." Used in Polish in photography, art, and medicine to describe a front-facing view or portrait, as opposed to a profile. Also used …

Latin for "after the fact." Used in Polish formal, legal, and academic language to describe analysis or evaluation done after an event has already occurred — …