"artlessly" in the adverb sense
1. artlessly, crudely, inexpertly
in a crude and unskilled manner
"an inexpertly constructed lean-to"
2. artlessly, ingenuously
in an ingenuous manner
"she answered the judge's questions artlessly"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License