IPA: /ˈsteɪtliər/
KK: /ˈsteɪtliːər/
More dignified and impressive in appearance or manner than something else.
The statelier buildings in the city center attract many tourists.
Statelier → It is formed from "state" (from Old French *estat*, meaning condition or status) and "-ly" (meaning in a manner of). The word "statelier" means in a manner that reflects a dignified or impressive condition or status.
Think of someone behaving in a way that reflects their impressive 'status' ('state') — that's why 'statelier' means to act in a dignified manner.