缩短
suōduǎn · HSK 4
shorten
✂️📏 缩短 = 缩 (shrink/contract) + 短 (short)
Compound of 缩 suō 'to contract, shrink' and 短 duǎn 'short' — literally 'shrink-short', meaning to shorten or cut down. 缩 also appears in 缩小 (reduce) and 退缩 (shrink back).
缩 — silk radical 糹 + 宿 (lodge, phonetic)
A semantic-phonetic compound. The silk radical 糹 carries the meaning, since shrinking and tightening were associated with drawing in cords or fabric. The right side 宿 (sù) supplies the sound. The original sense of binding cloth tight extended to the modern meaning 'to shrink' or 'contract.'
短 — arrow 矢 + bean/vessel 豆
Originally a phono-semantic compound: 矢 (arrow) gives the meaning, since arrows were used as a short measuring stick, while 豆 (an ancient stemmed vessel) supplied the sound. From 'short in length' the meaning broadened to 'short' in time, stature, or quality.