TSUMUGU · TOCFL C1 (est.) · 字
宏
宏 ＝ 宀 ＋ 厷
ㄏㄨㄥˊ · hóng
adj — grand, vast, on a great scale
字源 FORM — what the parts do
宀義a roof, the house
厷聲gōng — gives the soundan upper arm, the forearm bent — the wide span
IFTgōng → hóng — the arm-sound widened to hóng
Under the roof (宀) the hall runs deep and the sound rolls — a great, spacious house. 厷 gōng (the bent upper arm) carries the sound, widened to hóng. From a hall's depth the word goes to anything on a grand scale: 宏大、宏偉、宏觀.
故事 STORY — a scene to remember it by
走進一座大屋（宀），廳堂又深又空，喊一聲嗡嗡地響。
You step into a great house (宀); the hall runs deep and empty, and a shout comes booming back.
字源記憶法
意 · Meanings
(本義)宏大、宏偉— grand, vast, magnificent常用
→宏觀— macro, on a large scale常用
→宏圖、宏願— a grand plan; a great aspiration
(本義) original meaning · → ⇒ each arrow = one more step of extension
關 · Related
弘hóngthe lookalike — 弘 widens with a bow 弓, 宏 with a roof ; both mean vast厷gōngthe sound it carries — bare 厷, the bent arm before the roof