つまらない（つまらない、tsumaranai）
- boring

The Japanese adjective つまらない means "boring," "uninteresting," "dull," "trivial," or "unimportant." It describes something that lacks excitement, appeal, or significance. It can refer to people, things, events, or situations. The core idea is a lack of engagement or stimulation. The meaning of つまらない can also vary slightly depending on the context.

⚫︎この映画はつまらないね。 Translation: This movie is boring, isn't it? ⚫︎彼の話はいつもつまらない。 Translation: His stories are always boring. ⚫︎つまらないことで時間を無駄にしたくない。 Translation: I don't want to waste time on trivial things.

⚫︎You can use つまらない to describe anything you find uninteresting or dull. ⚫︎It's common in everyday conversation. ⚫︎Be mindful of the context; it can sometimes be a harsh criticism, so consider your relationship with the person or the subject you're talking about.

⚫︎The word is typically written in hiragana as つまらない. ⚫︎The kanji form is 詰まらない, but it's rarely used in everyday conversation, and the kanji itself is not commonly used.

⚫︎退屈（たいくつ）な - boring (formal) ⚫︎面白くない（おもしろくない） - not interesting ⚫︎味気ない（あじけない） - bland, tasteless (can also refer to things other than entertainment)

⚫︎面白い（おもしろい） - interesting, funny ⚫︎楽しい（たのしい） - fun, enjoyable ⚫︎興味深い（きょうみぶかい） - interesting, engaging

この本はつまらないから、もう読まないことにした。 ・Translation: This book is boring, so I decided not to read it anymore. ・Explanation: The speaker found the book uninteresting and decided to stop reading it.

つまらない冗談（じょうだん）は、誰も笑わない。 ・Translation: No one laughs at a boring joke. ・Explanation: The sentence highlights how a つまらない joke fails to elicit laughter because it lacks humor or wit.

The etymology of つまらない is related to the verb 詰まる（つまる）, meaning "to be blocked" or "to be congested." The negative form, 詰まらない, implies something that isn't full or complete, thus lacking substance and leading to the meaning of being つまらない. Therefore, things like つまらない things aren't "filled up" with interesting qualities.