Calm
Calm verb - To free from distress or disturbance.
Spring up
Spring up verb - To come to one's attention especially gradually or unexpectedly.
Both terms in one sentence
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The reason why was because earthquakes are releases of energy from the ground, and it was probable that even more energy than normal was building up during the years the ground remained calm and would all spring up at any moment with a particularly destructive quake.
Source: It's Quiet... Too Quiet
Cite this Source
Spring up and Calm. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/calm/spring_up
Calm & Spring up. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/calm/spring_up>.
Spring up or Calm. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/calm/spring_up.
Google Ngram Viewer shows how "calm" and "spring up" have occurred on timeline