The word "re percussed" is spelled with a prefix "re-" added to the base word "percussed". It is pronounced /ˌriː.pəˈkʌst/. The first syllable "re-" is pronounced as /ri:/ and means "again". The second syllable "percuss" is pronounced as /pəˈkʌs/ and means "to strike sharply". Thus, the word "re percussed" means "to strike again". The spelling of this word is straightforward and follows standard English phonetics.
The word repercussed is derived from the Latin word repercussus, which is the past participle of repercutere. Repercutere combines the prefix re- meaning back or again, and percutere meaning to strike or to beat. Thus, repercussed essentially means struck again or beaten back.