jar
UK[dʒɑː(r)]US[dʒɑːr]
n
A wide-mouthed cylindrical container, typically made of glass or earthenware and without a lid, used for storing food or other substances.
n
A sudden jolt or shock.
v
To cause a sudden, unpleasant jolt or shock.
v
To be incongruous or clash.
Etymology
The word 'jar' originates from the late 16th century, likely as an onomatopoeic formation imitating the harsh, grating sound of objects striking together. This imitative origin is evident in its primary verbal sense, 'to cause a jolt or shock,' which directly evokes the sound and sensation of a sudden, discordant impact. From this core idea of a harsh sound or physical vibration, the meaning naturally extended to describe a metaphorical clash or incongruity. The noun sense for a cylindrical container is unrelated, deriving from the French 'jarre' and ultimately the Arabic 'jarra', meaning 'earthen water vessel,' and entered English via Spanish in the late 15th century, resulting in a homograph.
Analysis
The word 'jar' is a simplex word of onomatopoeic origin. It is not productively formed from smaller, meaningful morphemes in modern English.
Examples
She stored the homemade jam in a large glass jar.
The sudden noise gave him a nasty jar.
His arrogant comments jarred with the friendly atmosphere of the meeting.