noun
Refers to the physical state of having an empty stomach, often implying hunger. Used in expressions like 空き腹にまずいものなし (nothing tastes bad on an empty stomach).
空き腹で運動するのはよくない。
Exercising on an empty stomach is not good.
空き腹にまずいものなしと言うから、何でもおいしく感じる。
As they say, nothing tastes bad on an empty stomach, so everything seems delicious.
Mixed kanji-kana spelling; less common but still used.
空腹 is a more formal and common word for an empty stomach or hunger. 空き腹 is slightly more colloquial and often used in set phrases.
Compound of 空き (empty) and 腹 (stomach). The reading すきはら is standard; すきばら is a voiced variant (rendaku) sometimes heard in speech.