About to
Close on
Both terms in one sentence
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He glowers at the zappy-arms and starts walking towards the glass as if he's about to say something, but the shutters close on him before he says anything.
Source: Video Game / XCOM: Enemy Unknown - Both make it, but just as the door is about to close on Hellboy's tail, he flicks it out of the way Just in Time.
Source: Indy Hat Roll
Cite this Source
Close on and About to. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/about_to/close_on
About to & Close on. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/about_to/close_on>.
Close on or About to. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/about_to/close_on.
Google Ngram Viewer shows how "about to" and "close on" have occurred on timeline