1.
neck
The part of the body connecting the head to the shoulders. Used for physical descriptions and neck-related expressions.
2.
dismissal, firing (from a job)
Colloquially, 首になる means to be fired from a job. This usage comes from the old practice of beheading.
首 refers to the neck, and also means 'firing' in business contexts.
COMMON EXPRESSIONS (BODY):
- 首が痛い: my neck hurts
- 首が凝る: neck becomes stiff
- 首を傾げる: to tilt one's head
IDIOM:
首を長くして待つ: to wait eagerly (lit. 'wait with a long neck')
BUSINESS EXPRESSIONS:
- 首になる: to be fired/dismissed
- 首にする: to fire someone
RELATED BODY PARTS:
- 頭: head
- 肩: shoulder