na-adjective
A loanword from English, used as a na-adjective to describe something that endures for a long time, often in contexts like cosmetics, relationships, or effects.
この口紅はロングラスティングで、一日中落ちにくい。
This lipstick is long-lasting and doesn't come off easily all day.
ロングラスティングな関係を築くには信頼が大切だ。
Trust is important for building a long-lasting relationship.
Borrowed from English 'long-lasting', adapted into Japanese as a na-adjective.