i-adjective
orderly; well-ordered; systematic
Describes a person, group, or system that follows rules and maintains good order. Often used for disciplined lifestyles, organized work, or methodical approaches.
彼は規律正しい生活を送っている。
He leads an orderly life.
規律正しいチームは強い。
A well-disciplined team is strong.
整然 is a noun/adjectival noun meaning 'orderly' or 'methodical,' often used for physical arrangements or logical structure, whereas 規律正しい is an adjective describing disciplined behavior.
Compound of 規律 (kiritsu, 'discipline, order') and 正しい (tadashii, 'correct, proper'). The exact historical derivation is uncertain, but the combination naturally yields the meaning 'orderly, disciplined.'