Ⅰ. conceal “隐藏、隐瞒”常与hide通用;但比hide正式些，多指有意将某事物隐藏起来或不予以泄漏。它只用作及物动词。如：
① The box was concealed under the bed.箱子是藏在床底下的。
② He concealed his moteves. 他隐瞒了他的动机。
Ⅱ. hide “隐藏、掩盖、躲藏”为普通用语。指有意或无意地将某物(或人)藏(躲)在人们不易看到或发现的地方。可作及物动词和不及物动词。如：
① Where did you hide it? 你把它藏到哪里了?
② He cannot hide the truth. 他不能掩盖真相。
③ The moon was hideen by the clouds. 月亮被云彩遮住了。