pleasant: stresses a quality inherent in an object: a ~ evening.


pleasing: close to pleasant, stresses the effect that something on one: a ~ arrangement of color.


agreeable: applies to what is IN ACCORD WITH one's tastes or liking: an ~ companion(同伴).


grateful: implies satisfaction, relief, and comfort yielded by what is agreeable and pleasing: the fire threw a ~ warmth into the room.


gratifying: implies mental pleasure from satisfying one's hopes, desires, conscience and vanity: a ~ sense of accomplishment.


welcome: STRONGER than pleasing and gratifying, stress pleasure by satisfying a prior need or longing: as ~ as rain after a  long drought.


pleasant: 强调内在属性, pleasing: 意思接近，但强调效果, agreeable: 符合品味喜好, grateful: 使人满意放松舒适,gratifying: 内心愉悦<--满足愿望良知自尊,  welcome: 程度更强，强调满足需求和渴望。


记忆方法: 1）首字母联想，WAPPGG: 我爱瓶瓶罐罐-->愉悦。

         2）愉悦的意思是令人思想或感官上感到快乐mean highly acceptable to or delighting the mind or senses.