レジ（レジ、reji）
- cash register

The word レジ, derived from the English word "register," primarily refers to a cash register or point-of-sale (POS) system in Japanese. It's the place where you pay for your purchases in a store. レジ can also refer to the person operating the cash register, the cashier.

⚫︎ あの商品はレジで精算してください。 Translation: Please pay for that product at the cash register. ⚫︎ レジの列が長いです。 Translation: The line at the cash register is long. ⚫︎ すみません、レジはどこですか？ Translation: Excuse me, where is the cash register?

⚫︎You would use レジ when talking about the cash register itself or the act of paying for something. ⚫︎It's common to ask, レジはどこですか？ (Where is the cash register?) when you can't find it. ⚫︎You might say something like, レジでお金を払います (I will pay at the cash register) when describing your shopping process.

⚫︎ レジ is written in katakana, as it's a loanword from English. ⚫︎There is no Kanji for レジ. ⚫︎There are no variations in okurigana.

⚫︎While not a direct synonym, 会計 (かいけい - accounting, payment) could be used in some contexts, but it's broader. ⚫︎キャッシュレジスター (kyasshu rejisutaa - cash register) is another, more formal, way to say it, but less commonly used. ⚫︎レジ is sometimes used to refer to a cash register.

There aren't direct antonyms for レジ in the same way as words like "hot" and "cold." The opposite action could be "not paying" or "returning an item" 返品(hempin).

このお店はクレジットカードは使えますか？ レジで聞いてください。 ・Translation: Does this store accept credit cards? Please ask at the cash register. ・Explanation: This sentence combines asking about payment methods with the location of where to ask.

すみません、レジ袋をお願いします。 ・Translation: Excuse me, a shopping bag, please. ・Explanation: This sentence is asking for a bag at the cash register, as you'd usually receive one after paying.

The word レジ comes directly from the English word "register," which is used in the context of a cash register or the act of registering a purchase.