at a venture
adverb
Roget 675: experimentally etc. adj.; on trial, at a venture; by rule of thumb. if one may be so bold.
Roget 621: randomly, by chance, fortuitously; unpredictably, unforeseeably; casually etc. 156; unintentionally etc. adj.; unwittingly. en passant [Fr.], by the way, ... show more
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