To agree to do or not to do.
Reasonable ground for hope or expectation.
Something promised.
I will promise every time you ask me." – Nan of Music Mountain by Frank H. Spearman
Sir, you did promise you would hear me out. – A King, and No King by Francis Beaumont and John Fletcher
" That I will promise thee," she said. – The Golden Silence by C. N. Williamson and A. M. Williamson