noun, noun which may take the genitive case particle 'no'
concentricity
Technical term for having the same center, used in geometry and design.
この図形は同心円で構成されている。
This figure is composed of concentric circles.
same mind; unanimity; like-mindedness
Describes people sharing the same opinion, purpose, or feeling; often used in formal or literary contexts.
彼らは改革に同心して行動を起こした。
They acted in unison for reform.
同心の士が集まり、計画を練った。
Like-minded individuals gathered and devised a plan.
Edo-period constable; policeman (historical)
Historical term for a low-ranking police official in the Edo period, subordinate to a 与力.
See also: 与力
江戸時代、同心は町の見回りを担当した。
In the Edo period, constables patrolled the town.
concentric circles
working together with one mind; united in purpose
unity of mind; acting in perfect harmony
From Middle Chinese 同心 (duŋ sim, 'same heart/mind'). The kanji 同 (same) and 心 (heart/mind) transparently reflect the meanings of shared purpose and concentricity.