Definition of "unworthy"

[…] But alas the while!If Hercules and Lichas play at diceWhich is the better man, the greater throwMay turn by the fortune from the weaker hand:So is Alcides beaten by his page;And so may I, blind Fortune leading me,Miss that which one unworthier may attain,And die with grieving.

c. 1596–1598 (date written), William Shakespeare, “The Merchant of Venice”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act II, scene i]

AN HISTORICAL GEOGRAPHY OF THE RAILWAYS OF THE BRITISH ISLES. By Ernest F. Carter. Cassell. 63s. [...] Such a disappointing work is embarrassing to the reviewer and unworthy of the great House of Cassell.

1960 January, “New reading on railways”, in Trains Illustrated, page 26