Etymology:
The word "thumb" is derived from the Old English word "þuma", which in turn comes from the Proto-Germanic word "*þummaz".
Meaning:
The primary meaning of "thumb" is the outermost digit of the human hand, located opposite the other four fingers. It is the shortest and strongest digit, used for grasping, holding, and manipulating objects.
Origin:
The Proto-Germanic word "þummaz" is thought to be related to the Indo-European root "tew-", meaning "to swell" or "to thicken". This suggests that the thumb was originally seen as a thicker, bulging digit compared to the other fingers.
Additional Meanings:
In addition to its primary meaning, the word "thumb" has also acquired several figurative and specialized usages:
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