The kanji 則 primarily conveys the meanings of "rule," "standard," "regulation," or "to follow a rule." It implies something that is prescribed, a principle to be adhered to, or a model to be emulated. It also relates to a measure or a standard by which something is judged.

・On-yomi (音読み): ソク (soku) ・Kun-yomi (訓読み): のっと（る） (nottoru) - to follow, to be based on

⚫︎規則 (kisoku) Translation: rule; regulation ⚫︎原則 (gensoku) Translation: principle; rule; general rule ⚫︎即刻 (sokkoku) Translation: immediately; at once

The kanji 則 is a phono-semantic compound (形声文字, けいせいもじ). The semantic component is 貝 (かい), meaning "shell" or "currency," and in this context, it originally signified measurement or standard, as shells were used as a form of currency and thus needed a standard for their value. The phonetic component is 貝 with a different reading (but same radical). This combination suggests the idea of "a rule" or "standard" being a measure to adhere to. Over time, the meaning of 則 expanded to encompass rules, regulations, and adherence to principles.