KanjiJLPT N2
Packed

packed, close, pressed, reprove, rebuke, blame

Mnemonic

Your words of good luck are all packed into one tiny fortune cookie. You crack it open and an impossibly long scroll unfolds—every lucky phrase ever written, crammed in there. The words keep spilling out, packed so densely they bury the entire table.
Additional thoughts
Picture a comically overstuffed fortune cookie bursting with scrolls. The tighter you try to stuff the good luck words back in, the more they spring out—emphasizing the idea of cramming to the limit.
Quick recall
Words of good luck Packed impossibly tight inside one tiny fortune cookie.

Details

The keyword for 詰 is packed. This kanji conveys the idea of stuffing, cramming, or filling something tightly into a space, leaving no room to spare. It also carries the sense of cornering someone in an argument or interrogation, pressing them until there is no escape. By extension, it relates to bringing something to a conclusion or final settlement, as in working out all the details until nothing remains unresolved.
On'yomi
きつ、きち
Kun'yomi
つ.める、つ.め、-づ.め、つ.まる、つ.む