This is the 215th most frequent Japanese word.
オープン
"オープン" (ōpun) means "open."
Here, "オープン" functions as an adjective indicating receptiveness or openness to ideas or suggestions.
この会社は提案に対してオープンな態度を示しています。
This company shows an open attitude toward proposals.
In this sentence, "オープン" is used as an adjective describing a personality trait characterized by openness and friendliness.
彼はオープンな性格で、誰とでもすぐ仲良くなります。
He has an open personality and gets along with everyone quickly.
Here, "オープン" is used as a verb meaning "to open" in the context of businesses or establishments starting their hours of operation.