The Collaborative International Dictionary
Promissorily
Promissorily \Prom"is*so*ri*ly\, adv.
In a promissory manner.
--Sir T. Browne.
Wiktionary
promissorily
adv. In a promissory manner.
Usage examples of "promissorily".
The old terrorists shepherded the boys in first, then Basingstoke handed Oniko in to Heimat, who stroked her head promissorily before setting her down.