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to stop up
[phrase form: stop]
01
to seal something tightly
Example
The plumber had to stop up the pipe to prevent any further water leakage.
She used a special wax to stop up the cracks in the old window.
He decided to stop up the gaps in the door to keep the cold air out.
To avoid any spills during transportation, the courier made sure to stop up the openings in the fragile package securely.
