Glower [ˈglau̇(-ə)r, ˈglō(-ə)r]
1. To look or stare with sullen annoyance or anger
2. A look of dislike, discontent

● Usage:
The librarian glowered at us when she heard us laughing.
Large, black rain clouds glowered (looked likely to produce rain) in the sky.

First known use: late 14th century. Came from Middle English (Scots) 'glowren' - 'to glower'; akin to Middle Low German 'glūren' - 'to be overcast', Middle Dutch 'gloeren' - 'to leer'
The well-established part of its story leads us to Scotland, where 'glower' (or 'glowren', to use the older Scottish form of the word) has been used since the late Middle Ages.
Originally, the word meant simply 'to look intently' or 'to stare in amazement' but by the late 1700s, glowering stares were being associated with anger instead of astonishment. Beyond that the history of the word is murky.