At it
Both terms in one sentence
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Unfortunately for Megatron, Rhinox retained his intelligence meaning he was very good at it.
Source: The Starscream
Cite this Source
Retained and At it. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/at_it/retained
At it & Retained. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/at_it/retained>.
Retained or At it. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/at_it/retained.
Google Ngram Viewer shows how "at it" and "retained" have occurred on timeline