音节
yīnjié · HSK 2
syllable
🎵 音节 = sound (音) + segment/joint (节)
音 means sound and 节 means joint or segment (as in bamboo nodes). Together: a segment of sound, i.e. a syllable. The 节 also gives the sense of a rhythmic unit or beat, fitting the pitch meaning.
节 — bamboo radical 竹 (⺮) + 即
Originally written 節, depicting a bamboo joint — the segmented node where a stalk divides. The bamboo radical ⺮ gives the meaning, while 即 supplies the sound. From 'bamboo joint' the meaning expanded to any segment, hence 'section,' 'festival' (a marked point in the year), and 'restraint' (knowing where to stop).