広告（こうこく、kouこku）
- advertisement

The Japanese word 広告 (こうこく - *kōkoku*) primarily means "advertisement" or "advertising." It refers to any form of public announcement intended to promote a product, service, event, or idea. This can be in various forms, such as television commercials, print advertisements in newspapers and magazines, online banners, radio spots, and more. It is a broad term encompassing all promotional activities aimed at the public to increase awareness and sales.

⚫︎テレビ広告 Translation: TV advertisement ⚫︎新聞の広告 Translation: Newspaper advertisement ⚫︎インターネット広告 Translation: Internet advertisement

You use 広告 when discussing or referring to any kind of advertisement. It is a versatile word, appropriate in most contexts when you want to talk about advertising. You can use it in both formal and informal conversations. For example, if you want to say "I saw an advertisement for a new car," you could say, 新しい車の広告を見ました ("Atarashii kuruma no [kōkoku] o mimashita").

広告 is most commonly written in kanji as 広告. ⚫︎ The reading, as mentioned, is こうこく (kōkoku) in hiragana. ⚫︎ Although less common, it could also be written in katakana (though this is unusual unless specifically for stylistic effect). ⚫︎ There are no variations in the okurigana for this word.

There aren't many direct synonyms, as 広告 itself is very comprehensive. However, depending on the context, you might use more specific terms: ⚫︎ 宣伝 (*senden*) - promotion, publicity (can be broader than just advertisements). ⚫︎ コマーシャル (*komāsharu*) - commercial (specifically for TV or radio).

There aren't any direct antonyms for 広告. However, words or concepts that could be considered opposite could be: ⚫︎ 非広告 (*hi-kōkoku*) - non-advertisement, which could be related to things like word-of-mouth marketing or organic content.

あの映画の広告、すごく面白いね！ ・Translation: That movie advertisement is really interesting! ・Explanation: This sentence expresses an opinion about a particular advertisement.

この雑誌は広告が多い。 ・Translation: This magazine has a lot of advertisements. ・Explanation: This sentence describes the content of a magazine.

The word 広告 is a compound word derived from two kanji: ⚫︎ 広 (こう - *kō*): meaning "wide," "broad," or "to spread." ⚫︎ 告 (こく - *koku*): meaning "to announce" or "to tell." Together, they mean "to spread (a message) widely," which accurately reflects the function of advertising.