shaft
UK[ʃɑːft]US[ʃæft]
n
A long, narrow, typically vertical hole that gives access to a mine, accommodates a lift, or provides ventilation.
n
A long, narrow part or section forming the handle of a tool or club, the body of a spear or arrow, or a similar implement.
n
A ray or beam of light.
n
A long, narrow, typically vertical passage for something to move through, as in a machine or the body.
v
To treat someone unfairly or harshly.
Etymology
The word 'shaft' descends from the Old English 'sceaft', meaning a long, slender rod, such as an arrow or spear. This term has cognates across other Germanic languages, like Old Norse 'skaft' and Old High German 'scaft', all pointing to a common Proto-Germanic root skaftaz. The core semantic notion of a long, thin, rigid object has remained remarkably stable, extending metaphorically to describe mine passages, beams of light, and mechanical rods. The verb sense, meaning to treat unfairly, is a 20th-century American slang extension, likely evoking the image of being stabbed or penetrated by a spear.
Analysis
The word 'shaft' is a simplex word of Germanic origin. Its Old English form 'sceaft' is a single, indivisible morpheme meaning a long, slender object, such as an arrow or spear.
Examples
The miners descended deep into the earth via the main shaft.
He gripped the wooden shaft of the axe firmly.
A single shaft of sunlight broke through the thick canopy of leaves.