生理(せいり)

せいり
noun
physiology; menstruation, period
healthscience
1. physiology; bodily function
The workings of a living body, and the study of them.
It's a bodily function, so it can't be helped.
To study human physiology at university.
Getting sleepy is a natural physiological response of the body.
2. menstruation; (menstrual) period
A woman's monthly period. This is the usual meaning in everyday speech.
生理(せいり)が来(き)た。
My period started.
今月(こんげつ)は生理(せいり)痛(つう)がひどい。
My period pain is bad this month.
During my period I easily feel unwell, so I try not to overdo it.

COMMON COLLOCATIONS (sense 1, physiology):

  • 生理(せいり)現象(げんしょう): bodily function, physiological phenomenon
  • 生理(せいり)学(がく): physiology (the science)
  • 生理(せいり)的(てき)に無理(むり): physically unbearable; casually, "I just can't stand (him/it)"

COMMON COLLOCATIONS (sense 2, period):

  • 生理(せいり)痛(つう): period pain, menstrual cramps
  • 生理(せいり)用品(ようひん): sanitary products
  • 生理(せいり)休暇(きゅうか): menstrual leave (a legal right in Japan)
  • 生理(せいり)が来(く)る / 生理(せいり)になる: one's period starts

Usage

In sense 2, 生理(せいり) is the ordinary, polite word; the medical term is 月経(げっけい).