主题歌
zhǔtígē · HSK 7
song
🎵 主题 theme + 歌 song = the signature song of a show or film
主 — flame/lamp on top of a stand 王
Originally a pictograph of a lamp with a flame on top of its stand, representing the lord or master of the household who tended the fire. The meaning extended from 'lamp/host' to 'master, owner, main, principal'. The character 炷 (wick) preserves the original 'lamp' sense.
题 — page radical 頁 + 是 (phonetic)
题 is a phono-semantic compound. The right side 是 gives the sound (shì→tí), while the left 頁 (simplified 页, 'head/page') carries the meaning, since titles and topics were written at the top of a page. Original sense was 'forehead,' later extended to 'title, topic, problem.'
歌 — 哥 (phonetic 'gē') + 欠 (open mouth)
A semantic-phonetic compound. The right side 欠 depicts a person with an open mouth, supplying the meaning of singing or vocalizing. The left side 哥 gives the sound 'gē'. Together they form the verb and noun for 'song' or 'to sing'.