一見
いっけん · ikken · JLPT N1 · noun
expression
一見 = 一 (one) + 見 (look): one look, a quick glance at first sight
一 means one and 見 means look or see. Together they mean a single glance or a first impression. Ikken also appears in 一見さん, a first-time customer or visitor.
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.'