expression, noun
livelihood; bread and butter
Refers to the means by which one earns a living; often used in contexts discussing work, income, or sustenance.
彼にとって、この小さな店が生活の糧だ。
For him, this small shop is his livelihood.
多くの人にとって、農業は生活の糧である。
For many people, agriculture is their bread and butter.
生計 is a more formal term for 'livelihood' or 'living', often used in economic contexts, while 生活の糧 is a more expressive phrase emphasizing the source of sustenance.
糧 alone can mean 'food' or 'sustenance' in a literal or figurative sense, but 生活の糧 specifically refers to the means of making a living.
Compound of 生活 (livelihood, life) and 糧 (food, sustenance), literally 'the food of one's livelihood', figuratively meaning the source of one's income or means of living.