"Well then, how much money do you need to be happy?" "Ah. You can really poke at my sore spots."
Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means stab so the verb vocab version must also be to stab.
If you're going to get stabbed, don't get stabbed two (つ) times. You can remember that this is the "two time stab" stab because it has a hole that's big. The hole is big because you got stabbed twice.