This is the 5963rd most frequent Japanese word.
わきまえ
"わきまえ" means discernment, propriety, or understanding of one's place or role.
In this sentence, 'わきまえ' is used to express understanding one's position or role in a situation.
彼は自分の立場をわきまえて行動した。
He acted with an understanding of his position.
'わきまえ' here refers to the awareness or discernment of appropriate language usage in a given context.
その場にふさわしい言葉遣いをわきまえるべきだ。
You should understand the proper choice of words suitable for the situation.
The usage of 'わきまえ' in this sentence demonstrates the necessity of understanding and prioritizing in accordance to circumstances.