everlasting

Lasting or enduring forever; endless, eternal.

Chiefly of a deity or other supernatural being: having always existed and will continue to exist forever; eternal.

Synonym of sempiternal (“having infinite temporal duration, rather than outside time and thus lacking temporal duration altogether”).

Continuing for a long period; eternal.

Happening all the time, especially to a tiresome extent; constant, incessant, unending.

Of clothing or fabric: lasting a long time; very durable or hard-wearing.

Having flowers that retain their colour and form when dried.

Of a plant or plant part: synonym of perennial (“active throughout the year, or having a life cycle of more than two growing seasons”).

Used as an intensifier.