テニス（テニス、tenisu）
- tennis

The Japanese word テニス refers to the sport of tennis. It is a ball sport played between two players (singles) or between two teams of two players each (doubles). The objective is to hit a ball over a net and into the opponent's court, earning points by successfully landing the ball within the court boundaries and preventing the opponent from returning it.

⚫︎ 週末はテニスをします。 Translation: I play tennis on the weekend. ⚫︎ テニスが好きですか？ Translation: Do you like tennis? ⚫︎ 彼女はプロのテニス選手です。 Translation: She is a professional tennis player.

テニス is used in the same way as "tennis" in English. You use it when talking about the sport, playing tennis, watching tennis, or anything related to the game. It is a straightforward word with no specific nuances. You can use it in both formal and informal conversations.

テニス is written in katakana, テ ニ ス. Katakana is used for loanwords, which are words borrowed from other languages (in this case, English). There are no other ways to write the word, as it is a foreign word. There are no variations in okurigana.

There are no direct Japanese synonyms for テニス. You would simply use the word テニス itself. However, you might use phrases to describe tennis, like 庭球 (ていきゅう), which is a more formal and less common term for tennis.

There aren't specific antonyms in the same way as you would have for verbs or adjectives. However, you might talk about other sports as the opposite, or activities that are *not* tennis.

今日、友達とテニスをしました。 ・Translation: I played tennis with my friend today. ・Explanation: This sentence uses the word テニス to describe the activity of playing the sport.

彼はテニスの試合を観戦するのが好きです。 ・Translation: He likes to watch tennis matches. ・Explanation: This sentence describes the action of watching a tennis match using the word テニス.

The word テニス comes directly from the English word "tennis." It was adopted into Japanese as a loanword, retaining the same meaning and basic pronunciation.