The kanji 円 primarily represents a circle or something round. It can also signify something complete, perfect, or harmonious due to the circular shape's association with wholeness. It can also represent money or currency, reflecting the shape of old coins.

・On-yomi (音読み): エン (en) ・Kun-yomi (訓読み): まる (maru) – round, circle

⚫︎ 円（エン）です。 Translation: It's round/a circle. (or depending on context, "It's a yen.") ⚫︎ 五百円（ごひゃくエン） Translation: 500 yen ⚫︎ 円満（エンマン） Translation: harmony, well-being

The kanji 円 is a pictograph. It originally depicted a circular object. The earliest forms show a circle, representing the shape of a coin or a round object. Over time, the shape simplified to its current form. The symbol evolved from a simple drawing of a circle to represent the concept of roundness, completeness, and eventually, currency.