Invalid
Invalid adjective - Chronically or repeatedly suffering from poor health.
Sure enough is an antonym for invalid.
Sure enough
Sure enough adverb - As supposed or expected.
Both terms in one sentence
- Sure enough, no matter how difficult the trials he faced were, Kirk always found a way to win, proving that the test was invalid as far as his abilities were concerned and he could always win.
Source: A Lesson In Defeat
Cite this Source
Sure enough and Invalid. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/invalid/sure_enough
Invalid & Sure enough. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/invalid/sure_enough>.
Sure enough or Invalid. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/invalid/sure_enough.
Google Ngram Viewer shows how "invalid" and "sure enough" have occurred on timeline