Daily Vocabulary(2015/10/20）

17156helpful(役に立つ）
I find it helpful to start from what worked in the past and apply it to the present day.
17157.rigidly(厳格に）
But not rigidly what was courteous behavior in another time and place may now be just opposite.
17158.tantamount to(同等で ）
To me, that's the height of rudeness, tantamount to to saying “you are less important than this other person”.
17159text message(携帯でやり取りされるような文字通信）
They suddenly break off and check text message on their smartphone or take a call.
17160.irk(イライラさせる、うんざりさせる）
One etiquette problem that really irk me.
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