próba.

attempt, effort, try (something done in the aim of accomplishing something)

rehearsal (practicing of something which is to be performed before an audience, usually to test or improve the interaction between several participating people, or to allow technical adjustments with respect to staging to be done)

trial, test (action intended to check something)

trial (difficult situation)

sample (example of someone's abilities)

sample (small amount of something taken for analysis)

fineness (ratio, in a precious metal, of the primary metal to any additives or impurities)

sample (subset of a population selected for measurement, observation or questioning, to provide statistical information about the population)

attempt, effort try; sample, fruit (result of someone's attempts)

proof (effort, process, or operation designed to establish or discover a fact or truth)