及び
および · oyobi · JLPT N1 · conjunction
and
及 (reach) + び: 'and' links things that reach each other, like 'and' joins items in a list
及 means 'reach' or 'extend to', so 及び extends one item to another, like the English 'and' linking two things together. Hiragana および is the common spelling in everyday text.
及 — hand 又 reaching person 人
Originally a pictograph showing a hand (又) catching or reaching a person from behind, depicting the act of catching up to someone. The core meaning 'to reach' or 'to catch up to' extended to 'and' (reaching/including more items) and 'in time for'. Modern form simplifies the person and hand into connected strokes.