essentially

The word “essentially” means basically, or in the most important respects. In plain terms, a way of saying "basically" or "at its core" when summing something up.

“Essentially” is pronounced ih-SEHN-shuh-lee (/ɪˈsɛnʃəli/ in IPA).

Here is “essentially” used in a sentence: “Essentially, the plan stayed the same, just with a new deadline.”

“Essentially” is an adverb.

“Essentially” is a fairly common word in modern English, usually learned at around the B2 level.

They overlap heavily and are often interchangeable. "Essentially" points to the true, core nature of something — what it is in essence. "Basically" leans toward simplifying or summarizing, as in "to put it plainly." In everyday speech the distinction is slight, and either can introduce your main point.

It signals that what follows is the core truth, setting aside minor details or exceptions. "The trip was essentially free" means that, apart from a few small costs, it amounted to free. It tells the listener to focus on the main point rather than the fine print.

It's neutral and works in both registers, appearing comfortably in academic and professional writing as well as casual conversation. Used too often as a filler, though, it can weaken your writing, so it's worth cutting whenever it adds nothing to the sentence.

Good alternatives include basically, fundamentally, in essence, in effect, and practically. Reach for "fundamentally" or "in essence" in weightier, formal contexts and "basically" in casual ones. All of them signal that you're stating the core of the matter.