Lest
To prevent and lest are semantically related. in for fear that topic. In some cases you can use "To prevent" instead a conjunction "Lest".
To prevent
Lest and to prevent are semantically related. Sometimes you can replace term "Lest" with "To prevent", this terms are similar.
Mutual synonyms
Both terms in one sentence
- He wanted to prevent the Consortium from becoming to open to new civilizations and ideas, lest they open themselves up to attack again.
Source: Fanfic / The Seven Hunters -
Starships must have some sensor system to prevent this already, lest the ship be perpetually surrounded by sensor phantoms of ships that had long ago left, but hey, Rule of Cool, right?
Source: Doppelgänger Spin -
Once you seen these, you'll definitely remember to take every precaution to prevent a fire from breaking out, and make sure that everyone's prepared in case one does, lest everything you hold dear goes up in smoke.
Cite this Source
To prevent and Lest. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/lest/to_prevent
Lest & To prevent. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/lest/to_prevent>.
To prevent or Lest. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/lest/to_prevent.
Google Ngram Viewer shows how "lest" and "to prevent" have occurred on timeline