eightfold
Meaning
eight times as great or as numerous
by eight times; so as to be eight times as great
Structure
Usage
the plan promised an eightfold increase in production capacity.
the investment yielded an eightfold return over a decade.
the concentration of the solution was increased eightfold in the experiment.
Etymology
the word 'eightfold' is a transparent compound formed within english from its old english and germanic roots. the first element, 'eight', descends from the proto-germanic ahtōu, itself from proto-indo-European oḱtṓw, a stable numeral. the second element, 'fold', originates from old english '-feald', related to the verb 'to fold', and is used to create multipliers, indicating a specific number of layers or times. the compound's logic is entirely arithmetic, directly combining the quantity 'eight' with the multiplier '-fold' to denote a multiplication by eight, a construction parallel to other numeric multipliers like 'twofold' or 'tenfold'.
Analysis
eight (old english, from proto-germanic, cardinal number); fold (old english, from proto-germanic, suffix forming multiplicative adjectives and adverbs)