携帯電話（けいたいでんわ、keitaいdenwa）
- mobile phone

The Japanese word 携帯電話 (けいたいでんわ, keitaidenwa) directly translates to "mobile phone" or "cellular phone." It refers to a portable electronic device used for telecommunication. This device allows users to make and receive phone calls, send and receive text messages, and access the internet, among other functionalities. The word emphasizes the portability and mobility aspect of the device. The 携帯電話携帯電話 has become an essential tool in modern life in Japan, much like in other countries.

⚫︎携帯電話を家に忘れました。 ・Translation: I forgot my mobile phone at home. ⚫︎新しい携帯電話を買いたい。 ・Translation: I want to buy a new mobile phone. ⚫︎携帯電話の充電が切れました。 ・Translation: My mobile phone battery is dead.

You use 携帯電話 in everyday conversations when referring to a mobile phone. It is a common and widely understood term. You can use it in various contexts, from describing its function to talking about problems or features related to it. It is perfectly acceptable in formal and informal situations.

⚫︎The word is primarily written using kanji and hiragana: 携帯電話. ⚫︎携帯 (keitai) means "portable" or "carrying," and 電話 (denwa) means "telephone." ⚫︎The hiragana spelling is けいたいでんわ. ⚫︎There is no variation in the okurigana for this word.

⚫︎Sometimes, particularly in more casual conversation, you might hear the abbreviated form: ケータイ (ke-tai). This is also commonly used and understood. ⚫︎スマホ (sumaho) is a shortened form of "smartphone," used for smartphones that have advanced functionalities such as internet browsing and app usage.

⚫︎There isn't a direct antonym. You might contrast it with other types of phones, such as a landline phone: 固定電話 (kotei denwa). However, this is more a contrast of type rather than a true antonym.

駅で携帯電話を落としてしまいました。 ・Translation: I dropped my mobile phone at the station. ・Explanation: This sentence describes the action of accidentally dropping the phone in a specific location.

携帯電話の料金プランを見直す必要があります。 ・Translation: I need to review my mobile phone plan. ・Explanation: This sentence implies the user is considering changes to their mobile phone service contract.

The word 携帯電話 is a combination of two kanji words. The first part, 携帯 (keitai), is a noun meaning "portability" or "to carry." The second part, 電話 (denwa), means "telephone." Therefore, the word literally means "portable telephone," reflecting its primary function of being a telephone that can be carried around. This is a very apt description of what a 携帯電話携帯電話 is.