应邀
yìngyāo · HSK 7
on invitation
💌 应 = respond/comply + 邀 = invite; to come because you accepted the invite
应 — 广 (shelter) + 心 (heart) + 隹 (bird)
Originally written 應, this character combined a phonetic component with 心 (heart) to suggest 'responding from the heart' or 'answering a call'. The simplified form 应 keeps the top portion. Over time it broadened from 'respond/answer' to also mean 'should' or 'ought to'.
邀 — 辶 walk + 敫 (phonetic, 'bright/call out')
邀 is a phono-semantic compound. The 辶 radical signals motion or going, while 敫 supplies the sound and a sense of calling out or sending forth. Together they convey going out to meet or summon someone, which evolved into the modern meaning 'to invite'.