Adjective and adverb comparison

May I ask the comparative forms of the following adjectives (like twardy > twardszy)?

mokry
cienki
wolny
błędny

And the comparative and superlative forms of the following adverbs (like trudno > trudniej, najtrudniej)?

bogato
brzydko
ciekawie
gładko
prywatnie
publicznie
pusto
staro
stromo
twardo
wesoło
zdrowo

Many thanks!

Tough task because there is no comparative form of some adjectives and adverbs.
For example drewniany (wooden). One can say "bardziej drewniany" - more wooden - but it doesn't make sense. It's not obvious even for native speakers :)
I will try anyway:

mokry - bardziej mokry
cienki - cieńszy
wolny (slow) - wolniejszy; (free) - no comparative form
błędny - bardziej błędny

Adverbs
bogato - bogaciej, najbogaciej
brzydko - brzydziej, najbrzydziej
ciekawie - ciekawiej, najciekawiej
gładko - gładziej, najgładziej
prywatnie - no comparative form
publicznie - no comparative form
pusto - bardziej pusto, najbardziej pusto (puściej, najpuściej)
staro - starzej, najstarzej
stromo - bardziej stromo, najbardziej stromo (stromiej, najstromiej)
twardo - twardziej, najtwardziej
wesoło - weselej, najweselej
zdrowo - zdrowiej, najzdrowiej


Objection? :)

You can of course simplify the process by using words such as bardziej and najbardziej before the adjective.

For your personal use, you could simplify the process even further, by just shutting up and not confusing non-Polish readers with your questionable suggestions about the Polish language and faulty translations.

in some cases you shouldn't, it simply doesn't sound well

bardziej krótki, najbardziej ładny?

The alternate comparative forms for pusto and stromo that Hiro gives may be analogous to English forms:

My glass is emptier than the others, although it isn't ungrammatical, sounds less correct than My glass is more empty than the others.

But the English equivalent of Michal's suggestion (simply use more and most, forget -er and -est) simply doesn't work:

My glass is smaller than the others is correct, while My glass is more small than the others sounds very wrong.

As others have indicated, such a simplification doesn't always work in Polish either.

Many thanks for the responses.

In that case does such frases as 'mam wielki rower' or 'mam wielki dom' sound better?

The question in this thread was about Adjective and adverb comparison, so no, your examples would not sound better.

It is bad form. There are in Polish no words bogaciej, najbogaciej.
bogato - no comparative form

I disagree, they sound strange (and aren't used often), but they exist.

stromo - stromiej, pionowo ;-) ( bardziej stromo niż pionowo już nie ma)
joke ;-)

pusto - bardziej pusto, całkiem pusto

it's not a joke
term całkiem pusto is very spreaded and useful