also: ちちょう
noun
looseness and tension; relaxation and strain
Refers to the state of being alternately loose and tight, often used in physical or metaphorical contexts such as muscles, strings, or policies.
弦の弛張を調整する。
Adjust the looseness and tension of the string.
noun
leniency and strictness; magnanimity and sternness
Describes a balanced approach between being lenient and strict, often in leadership, discipline, or governance.
指導には弛張が必要だ。
Guidance requires both leniency and strictness.
緩急 refers to slowness and speed, or leniency and severity, but 弛張 emphasizes the alternation between loose and tight states, often with a physical metaphor.
Compound of 弛 (relax, loosen) and 張 (stretch, tense). The exact historical derivation is uncertain, but the word is formed from two kanji with opposing meanings to express a dual state.