"talk earnestly" is a perfectly correct and usable phrase in written English.
You can use it to describe someone who is speaking in a sincere and serious manner. For example: "John spoke earnestly about the importance of service in his community."
Managing this feat while stockmarket indices plummet and sober economists talk earnestly of meltdown is even more impressive.
Rushing between lessons with their old-fashioned files, some boys talk earnestly about their essays and marks.
Here, grown men talk earnestly about dog poo: "Feed your dog this and it will live longer, have a great coat, good teeth and great energy," says Davies.
In Scotland, this phenomenon is evident in those players from non-Old Firm clubs who talk earnestly of making a serious challenge, perhaps even of landing the championship.
Talk, the magazine famous for still believing that something called synergy exists, excels at putting together events at which e-commerce tycoons talk earnestly with hip-hop producers.
Instead, they talk earnestly about building their companies, and about the problems of managing growth in a place where every new idea, engineer or building seems to start a bidding battle.
My tastes at twenty ran more to sitting in a smoky bar drinking Scotch and talking earnestly about Wittgenstein.
How ubiquitous are those AT&T commercials with the inquisitive guy talking earnestly with the cute, lippy children?
Mr. Bangalter talks earnestly and often loftily in fluent English, sometimes breaking off to consult with his partner in French.
Later, at the after-show party, Endicott talks earnestly about wine and women.
Yet the two appear in a photograph on the co-operative's website, apparently talking earnestly.
