All observable antonyms
ob·serv·a·ble
O o adjective observable
- imperceptible — very slight, gradual, or subtle: the imperceptible slope of the road.
- invisible — not visible; not perceptible by the eye: invisible fluid.
- obscure — (of meaning) not clear or plain; ambiguous, vague, or uncertain: an obscure sentence in the contract.
- unnoticeable — attracting notice or attention; capable of being noticed: a noticeable lack of interest.
- hidden — concealed; obscure; covert: hidden meaning; hidden hostility.
- unrecognizable — to identify as something or someone previously seen, known, etc.: He had changed so much that one could scarcely recognize him.