Etymology
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perseveration (n.)

late 14c., perseveracioun "will to persevere;" early 15c., "duration, quality of persisting," from Old French perseveracion "persistence, stubbornness" (13c.) and directly from Latin perseverationem (nominative perseveratio), noun of action from past-participle stem of perseverare "continue steadfastly, persist" (see persevere). Psychological sense (1903) is from German (see perseverate).

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Definitions of perseveration

perseveration (n.)
the tendency for a memory or idea to persist or recur without any apparent stimulus for it;
perseveration (n.)
the act of persisting or persevering; continuing or repeating behavior;
his perseveration continued to the point where it was no longer appropriate
From wordnet.princeton.edu