If you confuse two things, you get them mixed up, so that you think one of them is the other one. 混淆
verb [vt. 及物动词] 使糊涂，使迷惑；混淆，弄错；使复杂化
To confuse someone means to make it difficult for them to know exactly what is happening or what to do. 使困惑• My words surprised and confused him. 我的话使他既惊讶又困惑。
con(共同) + fus(流) + e → 流到一起， 混合 → 混淆； 使迷惑
