Learn how to say Everlastingly correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word everlasting:
lasting forever or a very long time:
the damned would suffer everlasting torment
an everlasting reminder of this evening
1 (the everlasting) literary eternity.
2 (also everlasting flower) a flower of the daisy family with a papery texture, retaining its shape and colour after being dried, especially a helichrysum. Also called immortelle.