Infinite
That could be interlocution, dialog, chat, discussion, or talk.
It could be any of the mean words but with "i'm sorry i'm gonna say this mean word but..."
Without certainty could be replaced with 'possible' or maybe even 'doubtful'
It meant without. The Old English word for with was mid. The old word with was used to mean against, or toward, in the sense we still use in phrases like to fight with someone, to be angry with...