After careful consideration, we decided to offer her the job.

consideration 是名词，来自动词 consider（考虑）。consider 本身由前缀 con-（表示"共同、一起"）和词根 sider（来自拉丁语，意为"星星"）组成，原意是"观察星象"，后来引申为"仔细思考"的意思。consideration 指"考虑、思考"的过程或结果。