Definition of recrudesce in US English:

recrudesce

verb

[no object]formal
  • Break out again; recur.

    ‘diseases such as polio, which had been limited to a handful of countries, can recrudesce when conditions favor the virus’
    • ‘She was able to see a festering protest recrudescing.’
    • ‘So either the usage has recrudesced or the verb vanished only from formal written prose, not from the spoken language.’
    happen again, reoccur, occur again, be repeated, repeat, repeat itself
    View synonyms

Origin

Early 18th century: back-formation from recrudescence.

Pronunciation

recrudesce

/ˌrēkro͞oˈdes//ˌrikruˈdɛs/