to wear formal or special clothes
正式または特別な服を着る (seishiki matawa tokubetsuna fuku wo kiru)
"We don’t have to dress up for tonight’s dinner—it’s casual."
"今夜のディナーにはドレスアップしなくていい—カジュアルだ。" (konya no dinā ni wa **doresu appu** shinakute ii—kajuaru da.)
the last or most difficult challenge or area of exploration
to catch someone in the act of doing something wrong
a situation without problems or difficulties
to trust someone with something important
To be familiar with a routine or procedure.
to relax after a stressful or dangerous situation
