足し

たし【足し】

¶小説は腹の～にはならない

You can't eat a novel.

¶読まなければ本は何の～になるのか

What good is a book if you don't read?

¶副業として本を書いて収入の～にする

supplement one's income by writing books.

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たし【足し】

〔補い〕 a complement; a supplement; making up.

●腹の足し sth to satisfy one's hunger (for a while); a bite to eat; a snack

・ケーキなんて腹の足しにならん. A piece of cake wouldn't be enough (to fill me up).

…の足しにする make up for…; make…good; supplement….

●収入の足しにする supplement [add to, eke out] one's income 《with sth》

・彼はバイトをして学費の足しにしている. He is helping out with his school fees by doing a part-time job.

・これは少ないが生活費の足しにしてくれ. This isn't much, but put it toward your living expenses.

・不足の足しにする make [fill] up a deficiency.

…の足しになる be of (some) use [help] in….

●これだけでも何かの足しにはなるでしょう. Even this will be of some use [be something, go some way].

・そんなものをもらっても何の足しにもならない. A gift like that will be (of) no use [help] at all.