Hypertext Webster Gateway: "rancorous"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Rancorous \Ran"cor*ous\, a. [OF. rancuros.]
Full of rancor; evincing, or caused by, rancor; deeply
malignant; implacably spiteful or malicious; intensely
virulent.
So flamed his eyes with rage and rancorous ire.
--Spenser.
From WordNet (r) 1.7 (wn)
rancorous
adj : showing deep-seated resentment; "preserve...from rancourous
envy of the rich"- Aldous Huxley
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