侃侃而谈

to speak frankly with assurance

upright and honest / cheerful / to chat idly / to boast / to talk smoothly

old variant of 侃[kan3]

to possess assurance and composure

and / as well as / and so / but (not) / yet (not) / (indicates causal relation) / (indicates change of state) / (indicates contrast)

surname Tan

to speak / to talk / to converse / to chat / to discuss