KanjiJLPT N1
Scaffold

scaffold, cleat, frame, jetty, bolt (door)

Mnemonic

A gladiator desperate to escape the arena fells a tree with his blade, hacking the trunk into rough planks. He lashes them together into a crude scaffold, stacking the wooden framework against the wall. Each beam groans under his armored weight as he climbs toward freedom.
Additional thoughts
Picture the gladiator literally building a scaffold from a single tree—raw wood, hasty construction, splinters everywhere. The urgency of escape makes the image stick: tree + gladiator = scaffold.
Quick recall
A gladiator chops a tree into planks and builds a scaffold to escape the arena.

Details

The keyword for 桟 is scaffold. This kanji refers to a temporary wooden framework or platform used in construction, as well as crosspieces or rails made of wood. It can also denote a pier, wharf, or ledge—essentially any plank-like wooden structure that serves as a support or walkway. The character conveys the idea of wooden beams arranged to provide footing or structural reinforcement.
On'yomi
さん、せん
Kun'yomi
かけはし

Used in vocab