From that sense of the word urchin as a small creature, it was later extended to a mischievous child, and then sometimes to any small child, especially one considered to be poor or crude by those of higher classes.

从这个词“urchin” 作为小生物出发，后来延伸到指淘气孩，有时也指任何小孩，是那些被上层阶级认为贫穷或粗俗孩。