expression
do not fold; do not bend
A fixed phrase printed on mail or packages to request careful handling. Not used in ordinary conversation.
封筒に「折曲厳禁」と赤字で書いてあった。
"Do not bend" was written in red on the envelope.
Compound of 折る (to fold), 曲げる (to bend), and 厳禁 (strictly prohibited).