puzzlebox

noun
UK /ˈpʌz.əl.bɒks/
US /ˈpʌz.əl.bɑːks/

A puzzlebox is a special box with a tricky lock or hidden parts that you must solve to open.

She twisted and slid the panels of the puzzlebox until the lid finally popped open.


OTHER MEANINGS

2. A story or film with a complicated plot full of mysteries and clues.

The movie is a puzzlebox that keeps you guessing until the last scene.

3. A problem or situation that is hard to understand and seems designed to confuse.

The whole case was a puzzlebox of lies and half-truths.

4. A toy or game box containing jigsaw puzzles or brain teasers.

Grandma gave him a puzzlebox full of wooden brain teasers for his birthday.