This is the 5735th most frequent Japanese word.
つぶし
"Crushing" or "smashing."
Used as a verb, 'つぶす' means 'to crush' or 'to smash'.
この機械は缶をつぶすのに使うことができます。
This machine can be used for crushing cans.
Used as a noun, '暇つぶし' (himatsubushi) means 'killing time'.
暇つぶしに映画を観ました。
I watched a movie to kill time.
Used as a passive verb, 'つぶされる' expresses that something was crushed or destroyed.