persevere
C2Substantiv/US /pɚsəvˈɪr/ pərs-əv-ĬR; UK /pɚsəvˈɪr/ pərs-əv-ĬR/
To persist in any business or enterprise undertaken; to pursue steadily any project or course begun; to maintain a purpose in spite of counter influences, opposition, or discouragement; not to give or abandon what is undertaken.
