The Collaborative International Dictionary
Passingly
Passingly \Pass"ing*ly\, adv.
Exceedingly.
--Wyclif.
Wiktionary
passingly
adv. In a passing manner.
Usage examples of "passingly".
But the list of people who were at least passingly computer literate and who also knew a lot about my relationship with Desdemona, and about you Wainwrights in general, was a lot shorter.
Ryan bolstered the blaster, passingly wondering at how tight his index finger had been on the trigger.