verb no object

continue in a course of action even in the face of difficulty or with little or no prospect of success:

｟ほめて｠ (困難なことでもあきらめずに) «…を［に］» がんばってやり通す, 屈しない; 我慢する, 耐える «in, with, at» ; 【人を】信じ続ける «with» (→ persist)

e.g. his family persevered with his treatment.

late Middle English: from Old French perseverer, from Latin perseverare ‘abide by strictly’, from perseverus ‘very strict’, from per- ‘thoroughly’ + severus ‘severe’.