haphazard

satunnainen, umpimähkäinen

huolimattomasti

huolimaton random; chaotic; incomplete; not thorough, constant, or consistent
1886, N. H. Egleston, Arbor-Day, Popular Science Monthly, s:Popular Science Monthly/Volume 28/March 1886/Arbor-Day|p. 689:

The haphazard efforts of a few, working here and there without concert, easily spent themselves in attaining results far short of what were needed.

we assume a gas to be an assemblage of elastic spheres or molecules, flying in straight lines in all directions, with swift haphazard collisions and repulsions, like so many billiard balls.

There is a very considerable series of observations — non-instrumental, unsystematic, irregular, "haphazard" if you will — which any one with ordinary intelligence and with a real interest in weather conditions may undertake.

Do not make such haphazard changes to the settings; instead, adjust the knobs carefully, a bit at a time.