## Etymology
From Old French prolongation, from Late Latin prolongationem, from prolongare ('to prolong'), from Latin pro- ('forth') + longus ('long').

## AI Etymology
Prolongation comes from Old French prolongation, from Late Latin prolongationem, from prolongare ('to prolong'), from Latin pro- ('forth') + longus ('long'). The historical chain includes Latin prolongatio, Latin longus, and Proto-Indo-European *dlongʰos. The quoted older senses, "to prolong", "forth", and "long", supply the semantic anchors for prolongation. The formation is best read as compound and borrowed: the word prolongation carries its older form-history into a compact English lexical shape. In present English it is used as a noun, "the act of extending in time or space". Related English forms include prolong, prolonged, and longitude. The result is a noun whose etymology preserves both the older form and the later English specialization.

## Topics
- Space, Position & Direction
- Word Formation & Derivatives

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