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Webster 1913 Edition

Adj.

Unmoved by appeals for sympathy or forgiveness; insensible to the distresses of others; destitute of tenderness; unrelenting; unyielding; unpitying;

as, a prey to

relentless

despotism

For this the avenging power employs his darts, . . .
Thus will persist,

relentless

in his ire.

Dryden.

–

Re-lent′less-ly

adv.

–

Re-lent′less-ness

Noun.

Adj.

Unmoved by pity unpitying; insensible to the distress of others; destitute of tenderness; as a pray to relentless despotism.

For this th' avenging pow'r employs his darts,

Thus will persist relentless in his ire.

Relentless thoughts, in Milton, may signify unremitted, intently fixed on disquieting objects.

[This sense of the word is unusual and not to be countenanced.]