Unsuitable or inappropriate; not fitting the situation or context (used for remarks, behavior, expressions, etc.).
会議中に携帯電話で私語するのは不適切だと注意された。
I was warned that talking on my phone during the meeting is inappropriate.
その発言は公の場で述べるには不適切で、謝罪が求められた。
That remark was inappropriate for a public setting, and an apology was demanded.
個人情報の取り扱いが不適切だったため、社内で改善策を検討している。
Because personal information was handled inappropriately, the company is considering corrective measures.