IPA: /ˈdɜːrtiə/
KK: /ˈdɜrtiər/
More unclean or soiled than something else.
The kitchen is dirtier than the living room after the party.
Comparative: dirtier
Superlative: dirtiest
Dirtier → It is formed from "dirt" (from Old English *dyrte*, meaning soil or filth) and "-ier" (a comparative suffix indicating more). The word "dirtier" means having more dirt or being more soiled than something else.
Think of 'dirt' as soil or filth, and remember that 'dirtier' means having more dirt than something else.