四至儿 sìzhìr land boundaries Definitions Defs Origin Strokes Stroke Words Sentences Sents sìzhìr land boundaries 四至 sìzhì four boundaries the four boundaries of a house, plot of land, or field儿 兒 r particleaffix [erhua suffix] A suffix attached to a word to form a retroflex ending, often indicating a small size, a sense of familiarity, or turning a word into a noun.sìzhìr limits · conscientious 四至 sìzhì scope the limits or scope of a task or project儿 兒 r particleaffix [erhua suffix] A suffix attached to a word to form a retroflex ending, often indicating a small size, a sense of familiarity, or turning a word into a noun.