interact

The word “interact” means to communicate or engage with someone, or to have an effect on each other. In plain terms, to act, engage, or communicate together, affecting each other in the process.

“Interact” is pronounced ihn-tuh-RAKT (/ˌɪn.tɚˈækt/ in IPA).

Here is “interact” used in a sentence: “Children learn a lot by interacting with their peers.”

“Interact” is a verb.

“Interact” is a fairly common word in modern English, usually learned at around the B1 level.

"Communicate" means to exchange information, while "interact" is broader, covering any two-way engagement or mutual effect — children playing, users clicking through an app, or chemicals reacting. If information passes between people, either verb fits; if the exchange is one-way, only "communicate" works, because interaction is mutual by definition.

The standard preposition is "with": you interact with people, systems, or substances. "Interact to" is incorrect, and when two things affect each other you can drop the preposition entirely: "The two drugs interact."

It is generally redundant, because interacting already involves two or more parties acting on each other. "The students interact" or "the students interact with each other" says everything "interact together" does, so style guides recommend cutting "together."

Anything that affects something else and is affected in return can interact: medicines interact with other drugs, readers interact with content, and weather systems interact with ocean currents. The verb covers mutual effects of every kind, which is why scientific and technical writing uses it so heavily.