noun
morning sickness; nausea of pregnancy
Medical term for pregnancy-related nausea and vomiting, commonly used in everyday conversation.
妻はつわりがひどくて、あまり食べられない。
My wife has bad morning sickness and can't eat much.
つわりは妊娠初期によく見られる症
Morning sickness is a common symptom in early pregnancy.
妊娠 means 'pregnancy' itself, while つわり refers specifically to the nausea symptom.
The origin is uncertain; the kanji 悪阻 is a jukujikun spelling that does not reflect the word's derivation.