一阵
yī zhèn · HSK 7
a burst
💨 一 = one + 阵 = a single short spell, so one burst or one fit
阵 began as a battle formation, then a measure word for brief events. 一阵 counts one quick stretch: 一阵风 a gust, 一阵笑 a peal of laughter, 一阵痛 a spell of pain.
一 — single horizontal stroke
一 is one of the simplest pictographs in Chinese, depicting a single horizontal line to represent the number one. It has retained essentially the same form since oracle bone script over 3,000 years ago. By extension it also means 'first,' 'whole,' or 'same.'
阵 — 阜 (阝, mound) + 车 (chariot)
Originally depicted chariots arrayed beside a mound or earthwork, evoking a battle formation. The 阝 (mound) component suggests terrain, while 车 (chariot) points to military deployment. Meaning broadened from 'battle array' to 'a spell, burst, or short period.'