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, incidentally; as it may happen; at random, at a venture, at haphazard.    ... show more

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