機軸|きじくkijiku[1]atamadaka (head-high)

1. nounaxis; axle; plan; contrivance

• Synonym車軸しゃじくNeutralSpecifically the axle of a vehicle's wheels. Unlike 「機軸」, it has no figurative use for plans or approaches like 「新機軸」.
• Related軸じくNeutralBroader than 「機軸」: an axle or shaft, and figuratively a center or core, as in 「チームの軸」. The most common word here, with far wider uses than 「機軸」.
• Related心棒しんぼうNeutralThe rod at the center of a spinning wheel or top; also the core figure of a group. 「機軸」 today is mostly confined to 「新機軸」.
• Related回転軸かいてんじくNeutralThe central axis of rotation; a physics and machinery term with no figurative use, while 「機軸」 can mean a policy or plan.
• Related心木WrittenA wooden rod serving as a core, as in scrolls or wheels; rare and written. In everyday speech say 「軸」 or 「心棒」.

For a physical axle use 「軸」 or, for a vehicle's wheels, 「車軸」; for the core of a group use 「心棒」. 「機軸」 itself now survives mainly in 「新機軸」, meaning a new plan or approach.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 車輪しゃりん、機関きかんの中心ちゅうしんの軸じく。
2. 地球ちきゅうの地軸ちじく。
3. 活動かつどうの中心ちゅうしん。
4. 計画けいかく。工夫くふう。方法ほうほう。