chemically

The word "chemically" indicates a connection to chemistry—the science that deals with the composition, structure, properties, and reactions of matter. It goes beyond simple mixing or physical combinations; it refers to changes at the atomic and molecular level.

You'll often encounter "chemically" when describing processes involving substances transforming into new ones. For example: "The food was chemically altered by the preservatives," meaning its composition changed due to those additives. Or, "The soil was chemically treated to improve crop yield," indicating a change in its makeup through chemical applications.

"Chemically" is frequently used to distinguish between changes that are reversible (physical) and those that aren't (chemical). Ice melting is a physical change—you can freeze it back into ice. But wood burning is a chemical change; you can't un-burn the ash and get the original wood back.

It also appears in contexts describing how things interact at a molecular level, like "The two compounds reacted chemically to form a new substance." It is also used when discussing sensitivities, such as: "I am chemically sensitive to certain fragrances."

So, whenever something is changing due to interactions between atoms and molecules—not just being rearranged or reshaped—you're dealing with something that's happening chemically. It speaks to the fundamental building blocks of our world and how they interact.