This is the 7970th most frequent Polish word.
młotka
"Młotka" is the genitive or accusative singular form of "młotek," meaning "hammer" in English.
Instrumental case, indicating the tool used for performing the action.
Uderzyłem gwoździa młotkiem.
I hit the nail with a hammer.
Nominative case, identifying the hammer as the subject of the question.
Gdzie położyłeś młotek?
Where did you put the hammer?
Accusative case used to indicate possession of the object.