| Date: | 1300-1400 |
| Origin: | well 'to cause to boil' (11-15 centuries), from Old English wellan |
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well5 also well up [intransitive] literary
1 if a liquid wells or wells up, it comes to the surface of something and starts to flow out :
2 if a feeling wells or wells up in you, you start to feel it strongly :
Anger welled up within him.
Anger welled up within him.