The word de terminable means able to be determined or decided. The antonyms for this word include indeterminate, indefinite, uncertain, and ambiguous. Indeterminate means not precisely defined or established, and indefinite means not fixed, certain, or clearly defined. Uncertain refers to something that is (or may be) unknown, doubtful or unreliable, while ambiguous means open to more than one interpretation.
These antonyms suggest that de terminable is an adjective that describes a situation or condition that is firmly established, clear, and known. If something is de terminable, it can be defined without ambiguity or doubt. When one wishes to convey the opposite meaning or present a situation where there is a lack of clarity, the use of the mentioned antonyms will be useful.