adapt　動詞
　＜*ap- 表２＞9
　例文
　発音規則

　How to adapt to climate change　

　Ivory tower needs to adapt to online media landscape, scholar says　




apt　形容詞
　＜*ap- 表２＞1
　例文




adopt　動詞
　＜optare＞6
　例文
　発音規則

　How to adopt a beautiful newborn baby? 　





opt　動詞
　＜*optare＞1
　例文

　Justin Morneau urges players to opt for safer helmet　

　Man Who Opted Out of the Mega Millions Winning Ticket Pool