The kitchen floor was dirtier than the bathroom floor.
A chalkboard becomes whiter as it gets dirtier with chalk dust.
sturdier, sturdiest; dirtier, dirtiest; more faithful, most faithful.
The answer depends on what on earth you mean by the "dirtier" of a wave.
Conrad was dirtier then Connie.
It gets cleaner because of the weak acid that is in the soda we drink.
When Martial Arts was first developed, people would start out with white belts. As they would train, their belts would become dirtier and dirtier, and they would not wash them. They only became a black belt when their belt was so dirty that it was literally black.
Dirtier and dirtiest.
It depends what your activity level is and what activity you do. but generally long hair because it drags on everything it can touch, so it gets dirty.
The comparative form of "dirty" is "dirtier."
Well black looks more sexier, so I would choose black because white gets dirtier easier therefore you will spend yet more money washing it. BUY THE BLACK CAR!
tidier