一目
いちもく · ichimoku · JLPT N1 · noun
glance
👀 一 = one + 目 = eye: one eye, so a single quick look
一 means one and 目 means eye, so the word literally says one eye: a single look. Related: 一目瞭然 (いちもくりょうぜん) means obvious at a glance.
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.'