* Interpolate: To estimate a value within a known set of values. For example, if you have data points for January and March, you could interpolate to estimate the value for February.
* Generalize: To draw a broad conclusion from specific observations. This is the opposite of extrapolating in the sense that you are moving from specific to general, rather than specific to more specific.
* Simplify: To reduce complexity, which can be the opposite of extrapolating if extrapolation involves making a more complex model.
* Restrict: To limit or confine, which is the opposite of extrapolating if extrapolation involves expanding or extending a concept.
* Condense: To make something shorter or more concise, which is the opposite of extrapolating if extrapolation involves expanding or elaborating on a concept.
Ultimately, the best opposite of "extrapolate" depends on the specific context and the intended meaning.