Required before filing an issue:
I am a:
When one searches for instance for:
decadent,
...the app returns no results. decadent works as expected, giving a definition.
The user may accidentally select a period, comma or semicolon when sharing to the app -- Termux for instance highlights as follows:

The user has to carefully select just the word itself.
Off the top of my head, there's no benefit in "exact matching" for trailing & leading punctuation and symbols. Please ignore them in the search.