一个劲儿
yīgèjìnr · HSK 7
continuously
🔋 一+个+劲儿 = one measure of 劲 (energy) — keep at it with one steady burst
劲儿 (jìnr) means strength or energy; 一个劲儿 literally frames it as a single unbroken charge of effort, so the sense is doing something nonstop without easing off.
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.'
个 — person 人 over enclosure-like component (simplified from 個)
个 is the simplified form of 個, originally a measure word for bamboo stalks. The traditional form combines 人 (person) with 固 (firm, phonetic). Over time it became the most common general-purpose measure word in Chinese, used for people and many objects without a specific classifier.