幅度
fúdù · HSK 5
extent
📏 幅 (width of cloth) + 度 (degree) = extent or range
幅 originally meant the width of a roll of cloth, later generalized to width or breadth. 度 means degree or measure. Together: the degree of breadth, i.e. amplitude or extent of variation.
幅 — cloth radical 巾 + 畐 (full)
A semantic-phonetic compound: 巾 (cloth) gives the meaning, since 幅 originally referred to the width of a bolt of cloth. 畐 supplies the sound, related to 'fu'. The meaning later broadened to 'width' in general and to a measure word for paintings or scrolls.
度 — 广 (shelter) + 庶 abbreviated (phonetic)
Originally depicted a hand measuring length under a shelter, meaning 'to measure' or 'a measure/standard.' From this came extended senses like 'degree,' 'extent,' and 'to pass through' (as in passing time). The reading 'dù' means degree/measure, while 'duó' preserves the older verbal sense of measuring.