He spoke haltingly WordNet 3.0 & Open English WordNet

He spoke haltingly of his battle with cancer and its affect on his family. Wiktionary

I just learned how to read Korean this summer and am still new to the language, so I still read and pronounce the words haltingly when I try to read a sentence in Korean. I take over a minute, whereas one with an excellent command of the Korean language would take 12.5 seconds. Wiktionary