さよなら SayonaraGood Bye ...sayonara. The word sayonara means "goodbye" or "farewell." ... It's a Japanese word that has been a popular informal word in English since the late 1800s. It literally means "if it is to be that way," combining sayo, "that way," and nara, "if."
もったいないMottainai is a Japanese term conveying a sense of regret concerning waste. The expression "Mottainai!" can be uttered alone as an exclamation when something useful, such as food or time, is wast...
おなか ＝ Onaka ＝ Stomachいっぱい ＝ Ippai ＝ FullI am full.おなかいっぱいおなか が いっぱいおなか が いっぱい です。
わかりました -> I understandWakarimashitaわかりません -> I don't understandWakarimasenhttp://www.japanese-online.com
おしえて "Oshiete" menas "Teach Me!"_______ おしえて勉強（べんきょう）おしえて Please tech me to study.
だめです is a statement saying "No".You can simply say だめ as well.
もしもし is the phrase you use when you start talking on the phone.
じゃあAlthough you probably know さようなら (sayounara) is “goodbye,” it has a very strong sense of finality, almost like you may not see that person again. So it’s often better to say じゃまた. Other variations are じゃね (ja ne: “see you”), バイバイ (baibai: “bye-bye”), and お元気で (o-genki de: “take care”).Source: https://www.fluentin3months.com/japanese-words/
いくらですか ikuradesuka is phrase you use to ask for pricing.これは（Korewa）いくらですか。How much is this?あれは（Arewa）いくらですか。How much is that?