We are all aware of Algebra. You either hated it or loved it. Interesting fact is that the origin of this word can be found through the Arabic word الجَبَر which means to set. We find this word in the 9th century book:

ٱلْكِتَاب ٱلْمُخْتَصَر فِي حِسَاب ٱلْجَبْر وَٱلْمُقَابَلَة – The Compendious Book on Calculation by Completion and Balancing.