台本
だいほん · daihon · JLPT N1 · noun
scenario
台 — mouth 口 + 厶 (private)
Originally depicted a raised platform or terrace, suggesting elevation and a place to stand. The character later extended to mean stage, podium, or station. In modern usage it also serves as the simplified form of 臺 (platform) and 颱 (typhoon), and names Taiwan (台灣).
本 — tree 木 + mark at base
本 is a pictograph of a tree (木) with a stroke at its base, marking the roots. From this 'root' meaning it extended to 'origin,' 'source,' and 'foundation.' In modern usage it also serves as a measure word for bound objects like books.