Definition of nil desperandum in English:
nil desperandum
Pronunciation /ˌnil ˌdespəˈrändəm/ /ˌnɪl ˌdɛspəˈrɑndəm/
exclamation
Do not despair; never despair.
Origin
From Latin nil desperandum Teucro duce ‘no need to despair with Teucer as your leader’, from Horace's Odes 1.vii.27.