com·pli·cate 
/ˈkɑ:mpləˌkeɪt/ verb
com·pli·cates; com·pli·cat·ed; com·pli·cat·ing /ˈkɑ:mpləˌkeɪt/ verb [+ obj] 1 : to make (something) more difficult or less simple
▪ Changing jobs now would complicate her life. ▪ This complicates things. [=this makes the situation more difficult] ▪ To complicate matters further, his train is running late. [=his train is running late, which makes the situation even more complicated or difficult] 2 : to cause (a medical problem) to become more dangerous or harder to treat
▪ a disease complicated by infection
▪ Changing jobs now would complicate her life. ▪ This complicates things. [=this makes the situation more difficult] ▪ To complicate matters further, his train is running late. [=his train is running late, which makes the situation even more complicated or difficult]
▪ a disease complicated by infection
