plotting - How to apply compound styles to curves in e.g. Plot

Say, I have a colorlist

listColor={Black,Brown,Red,Cyan}

Now, I have some Plot function that I can use this list:

Plot[{Sin[x],Cos[x],x,x^2},{x,1,100},PlotStyle->listColor]

Everything went fine. Now, I wanted to make the plot style "thick"

But when I add:

Plot[{Sin[x],Cos[x],x,x^2},{x,1,100},PlotStyle->{Thick,listColor}]

The listColor breaks down. I understand I actually need

listColor={{Thick, Black},{Thick, Brown},{Thick, Red},{Thick, Cyan}}

But adding {Thick} to each entry of listColor is too hard. Is there anyway that I can append {Thick, } to each entry of the list elegantly?

I notice that using

Transpose[{Table[Thick,{i,1,4}],listColor}]

might work but it looks unnecessary...

Answer

You can use BaseStyle for some of directives:

listColor = {Black, Brown, Red, Cyan}
Plot[{Sin[x], Cos[x], x, x^2}, {x, 0, 1}, PlotStyle -> listColor, BaseStyle -> Thick]

Another way is to use all in PlotStyle:

PlotStyle -> Thread[Directive[listColor, Thick]] (*or just*)
PlotStyle -> Thread[{listColor, Thick}] (* or using your approach:*)
PlotStyle -> Table[{Thick, i}, {i, listColor}]