noun
The ability to judge what is appropriate in a given situation, often involving social awareness and restraint.
See also: 弁える
彼はわきまえがあるから、失礼なことは言わない。
He has discretion, so he won't say anything rude.
大人
Act with the discernment expected of an adult.
noun
knowledge; understanding; sense
Refers to having a proper grasp or awareness of something, often used in phrases like わきまえがある (to have sense/knowledge).
See also: 弁える
彼は自分の立場をわきまえている。
He knows his place.
危険をわきまえた上で、その仕事を引き受けた。
He took on the job with full knowledge of the dangers.
Noun form of the verb わきまえる (to discern, to distinguish). The kanji 弁 (modern) and 辨 (archaic) both carry the meaning of 'discernment' or 'distinguishing'.