Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
The word spumescere could not be parsed. Trying a normal dictionary lookup:
No entries found. Showing closest matches:
* spūmesco, ĕre, v. inch. n. [spuma], to grow foamy or frothy, to begin to foam or froth: aequora remo, Ov. H. 2, 87.