貸そうか

shall I lend it to you?

→ 貸す
phrase Rare #32,402
shall I lend it to you? A casual way to offer to lend something. In 手を貸そうか, it means “shall I help?” or “do you need a hand?”
JA: 荷物が重そうだね。手伝おうか、貸そうか?
EN: That luggage looks heavy. Shall I help you carry it?

おばあちゃん手を貸そうか

Grandma, can I help you?

— ハウルの動く城 (2004)

貸そうか

Want a hand?

どうしたらいいか売るのは嫌だ貸そうかともいくらです

I don't know what to do. I don't want to sell it, and I've also considered renting it out—but for how much?

— 花様年華 (2000)

手を貸そうか

Shall I give you a hand?

— ほんとうのピノッキオ (2019)

手を貸そうか

Shall I give you a hand?

— フォーリング・ダウン (1993)