also: ちちょう
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.
Adjust the looseness and tension of the string.
leniency and strictness; magnanimity and sternness
Describes a balanced approach between being lenient and strict, often in leadership, discipline, or governance.
Guidance requires both leniency and strictness.
relaxation oscillation
Standard kanji form; reading しちょう is the most common.
Alternate reading; less common and may be considered non-standard.
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.