当人
とうにん · tounin · JLPT N1 · noun
the one concerned
👤 当 (that in question, concerned) + 人 (person) = the concerned person
当 means 'that in question' or 'relevant', and 人 means 'person'. Together they name the person a matter is about, close to the modern term 当事人 (party concerned).
当 — small ⺌ + crown 冖 + hand 彐 (simplified from 當: 尚 + 田)
Originally written 當, combining 田 'field' with 尚 as a phonetic. The early sense was 'to match' or 'face' a field of equal value, extended to 'correspond to', 'ought to', and 'serve as'. The simplified form 当 streamlines the upper 尚 component.
人 — pictograph of a standing person
人 is a pictograph showing a person viewed from the side, with two strokes representing the legs and torso of a standing human. In oracle bone script it clearly depicted a figure leaning slightly forward. The meaning has remained 'person' or 'human' throughout its history.