stiff neck from sleeping wrong; kink in the neck
Refers specifically to neck pain or stiffness caused by sleeping in an awkward position. Often used in everyday conversation.
See also: 寝違え
I woke up with a stiff neck from sleeping wrong.
My neck is so kinked I can't turn my head.
Standard kanji spelling.
Mixed kanji-kana spelling; less common but still encountered.
Compound of 寝 (ne, 'sleep') and 違い (chigai, 'difference' or 'mistake'), literally 'sleep mistake', referring to the result of sleeping in a wrong position.