What is the comparative and superlative of words sturdy dirty faithful?

Here are the comparative and superlative forms of the words you provided:

* Sturdy:

* Comparative: Sturdier

* Superlative: Sturdiest

* Dirty:

* Comparative: Dirtier

* Superlative: Dirtiest

* Faithful:

* Comparative: More faithful

* Superlative: Most faithful

Note: "Faithful" is an irregular adjective. We use "more" and "most" to form its comparative and superlative forms.