関節（かんせつ、kansetsu）
- joint

The Japanese word 関節 関節 means "joint" in English. It refers to the part of the body where two or more bones meet, allowing for movement. It can also figuratively refer to a critical or connecting point in a process or situation.

⚫︎膝の関節 Translation: Knee joint ⚫︎指の関節が痛い Translation: My finger joints hurt. ⚫︎交渉の関節部分 Translation: The critical point of the negotiation.

This word is used in various contexts, including: ⚫︎Referring to the physical joints of the body in medical or anatomical discussions. ⚫︎Describing the mechanical joints in machinery. ⚫︎Figuratively representing key points, connections, or junctures in a plan, argument, or situation.

⚫︎The word 関節 関節 is primarily written in kanji. ⚫︎Reading: かんせつ (in hiragana). ⚫︎There are no variations in okurigana for this word.

There aren't many direct synonyms in Japanese for the physical meaning of "joint". However, depending on context, you might use words or phrases like: ⚫︎つぎて (tsugite) - Connection, joint (used more for mechanical or structural joints) For the figurative meaning: ⚫︎ポイント (point) - Point, important spot ⚫︎要点 (you ten) - Main point, gist

There aren't direct antonyms for the word 関節 itself. However, in the context of healthy joints versus injured joints, or flexible versus stiff joints, you could use words like: ⚫︎硬直 (kouchoku) - Stiffness, rigidity (opposite of flexible joints) ⚫︎可動性 (kadousei) - Mobility (opposite of a joint that is damaged or not working)

彼は関節炎で、膝が痛い。 ・Translation: He has arthritis and his knee hurts. ・Explanation: This sentence uses 関節 to describe the knee joint and its condition due to arthritis.

この機械の関節はよく潤滑油を塗る必要がある。 ・Translation: The joints of this machine need to be well lubricated. ・Explanation: This sentence uses 関節 to describe a mechanical joint and the need for maintenance.

The word 関節 is composed of two kanji: 関 (kan) which means "connection, relating to, barrier, or concern" and 節 (setsu) which means "joint, section, or knot". Together, they describe a point of connection or a place where two things are joined, which accurately reflects the meaning of "joint".