拓宽
tuòkuān · HSK 7
broaden
↔️ 拓 expand + 宽 wide = make wider, broaden
宽 — roof 宀 + 萈 (phonetic, originally a horned goat)
Originally written with 宀 'roof' over 萈, a horned mountain goat, suggesting a spacious dwelling large enough to house such an animal. The 萈 element also lent its sound. Over time the form simplified to today's 宽, and the meaning shifted from 'spacious house' to the general sense of 'wide, broad, lenient'.