beam
UK[biːm]US[biːm]
n
A line of light or other radiation
n
A long, thick piece of wood, metal, or concrete used in construction
n
A bright and happy smile
v
To smile radiantly
v
To transmit (a signal, radio waves, etc.) in a particular direction
Etymology
The word 'beam' originates from the Old English 'bēam', meaning a tree, a piece of wood, or a ray of light. This Old English term descended from the Proto-Germanic 'baumaz', which carried the primary sense of 'tree'. The semantic journey from 'tree' to 'structural timber' is a straightforward case of specialization. The development of the meaning 'ray of light' is a metaphorical extension, likely inspired by the visual similarity between a shaft of sunlight and a long, straight piece of wood. This dual meaning, encompassing both a solid object and an immaterial ray, has been preserved intact into modern English.
Analysis
The word 'beam' is a simplex word of Germanic origin. It is not productively formed from smaller, separable morphemes in modern English.
Examples
A beam of sunlight broke through the clouds.
The old barn's wooden beams were strong and sturdy.
Her face would beam with pride whenever she spoke of her children.