Lasting forever, or for an indefinitely long time.
Set up to be in effect or have tenure for an unlimited duration.
perpetual copyright
Continuing; uninterrupted.
"And yet," returned Francesca, "the secret of Arden's sufferings seems to have been in himself. From earliest youth he indulged in vain contrasts and repinings, and even his very love was selfish and cruel. Think how much happiness he lost by his perpetual exaggerations!"
Ellipsis of perpetual check.
From Middle English perpetuel, from Old French perpetuel, from Latin perpetuālis (“universal”), from perpetuus, from petō.
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