参加
cānjiā · HSK 2
to participate; to take part
🙋 参 = participate + 加 = add; 'add yourself in' = join / take part
参 carries the sense of participating or joining, and 加 means to add. Together 参加 literally reads as 'add-in participation' — to add yourself to an event, meeting, or activity, i.e. attend or take part.
加 — force 力 + mouth 口
加 is traditionally analyzed as a compound of 力 (strength) and 口 (mouth), suggesting boasting or exaggerating one's effort with words. From this it extended to the meaning 'to add' or 'increase'. Today it is used broadly for addition, both literal and figurative.