reverting 'tread'

content/module-reference/processing-modules/diffuse.md

@@ -172,7 +172,7 @@ These two steps can be performed on the zoomed-out image. Remember that, while g
 
 At this point, you may want to tweak the edge sensitivity to take care of any edge artifacts. In theory, diffusing in the isophote direction ensures that diffusion is contained inside edges, but this is not sufficient when corners and sharp convex shapes are present in the image.
 
-When the edge sensitivity control has been adjusted to produce satisfying results, the image usually becomes quite soft. In most cases it will be necessary, at this point, to increase the number of iterations in order to compensate. This will come with a performance penalty so treat carefully with the performance/quality trade-off depending on your hardware. If you can't increase the number of iterations, you will have to increase the diffusing speed.
+When the edge sensitivity control has been adjusted to produce satisfying results, the image usually becomes quite soft. In most cases it will be necessary, at this point, to increase the number of iterations in order to compensate. This will come with a performance penalty so tread carefully with the performance/quality trade-off depending on your hardware. If you can't increase the number of iterations, you will have to increase the diffusing speed.
 
 The final step is to fine-tune the third and fourth order, which take care of the high frequencies of each wavelet scale. You will need to be a lot more gentle with these settings than for the first and second orders, as they can cause noise to blow-up really fast.