persevering

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

Mr. Peters, "who liked verses," was especially persevering, and Sappho at length compliant. — Humorous Ghost Stories, Dorothy Scarborough
The ostensible, direct, and sufficient reason for my doing so was the persevering attack of the Bishops on Tract 90. — Apologia pro vita sua : $b being a history of his religious opinions, John Henry Newman
Chingachgook and Uncas profited by the interval to regain their wind, though Duncan continued to work with the most persevering industry. — The Last of the Mohicans; A narrative of 1757, James Fenimore Cooper

persevere, persist, hang in, hang on, hold on

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