一
いち · ichi · JLPT N5 · noun
one
☝️ ichi sounds like itchy: one itchy finger, and 一 is a single stroke
一 is one horizontal stroke, so the character counts itself: one line means one. For the sound, ichi is close to the English word itchy. One itch, one stroke, one.
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.'