Open up and Plug up

Open up

Open up verb - Cause to open or to become open.

Plug up is an antonym for open up.

Plug up

Plug up verb - To prevent passage through by filling with something.
Usage example: hair plugged up the drain

Open up is an antonym for plug up.
Cite this Source
Plug up and Open up. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/open_up/plug_up
Open up & Plug up. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/open_up/plug_up>.
Plug up or Open up. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/open_up/plug_up.
Google Ngram Viewer shows how "open up" and "plug up" have occurred on timeline