Maintain part of castle in revolt

Wikipedia Word definitions in Wikipedia
Keep Up may refer to: Keep Up (EP) , a 2016 EP by KSI "Keep Up" (KSI song) , a 2015 song by KSI "Keep Up" (Heavy Stereo song) , a 1996 song by Heavy Stereo "Keep Up" (Hyper Crush song) , a 2009 song by Hyper Crush

WordNet Word definitions in WordNet
v. maintain a required pace or level; "He could not keep up and dropped out of the race" lengthen or extend in duration or space; "We sustained the diplomatic negociations as long as possible"; "prolong the treatment of the patient"; "keep up the good work" ...

Wiktionary Word definitions in Wiktionary
vb. 1 (context transitive English) To maintain; to preserve; to prevent from deteriorating. 2 (context transitive idiomatic English) To continue with (work, etc). 3 (context intransitive idiomatic English) To stay even or ahead.