The term "in-estimable" refers to something that is beyond measure or cannot be estimated. Its antonyms include measurable, calculable, quantifiable, and definable. These words indicate that a value or quantity can be accurately determined, and they can be used to describe both tangible and intangible things. Measurable can be used to refer to physical attributes like weight, height, or volume, while quantifiable can be applied to things like temperature or time. Definable can indicate that something can be defined or classified, while calculable can suggest that an outcome can be predicted with some degree of accuracy. Overall, the antonyms for in-estimable reflect the ability to determine a specific value or characteristic of something.