undeterminable a not capable of being definitely decided or ascertained Usage(s) On Wednesday, he wore a light-brown pinstriped suit, a white shirt and a yellow tie with dots of an undeterminable color. The cocktail hour starts at 8:30, and until he sits down to his supper at some undeterminable time after 10 p. Whether there was any connection or not between the insidious diplomacy of the Manchurian War Lord and 5,000 Japanese in Tokyo was undeterminable. Synonym(s) indeterminable Antonym(s) determinable
Quotes undeterminable William Caldwell in Dallas Morning News The cause of death was "undeterminable at this point," and the two bodies will be taken back to the United States for DNA tests to confirm the identities, Caldwell said.