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.
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.
Standard kanji spelling.
Kana spelling for 糧, used when the kanji is considered difficult or for emphasis.
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.