你
nǐ · HSK 1
you
👉 你 = 亻(person) + 尔 (you/thou) — the 'person' radical marks it as a pronoun for a human
亻on the left is the standing-person radical; 尔 is an older word meaning 'you'. Adding 亻 specialised 尔 into the personal pronoun 你. Same person-radical shows up in 他 (he) and 们 (plural marker).
你 — person radical 亻+ 尔 (you)
你 combines the person radical 亻with 尔, an older second-person pronoun. 尔 originally depicted a decorative object and was borrowed phonetically. Adding 亻clarified the human meaning, giving the modern informal 'you' used in Mandarin today.