Where does “underreplacement” come from?

underreplacement (English) comes from English replacement, from English replace, from English re-, from Middle English re-, from Old French re-, from Latin rĕ-, from Latin prōdūcō, from Latin prō- — passed , crossed.

underreplacement (English): The replacement of a substance at a level less than what makes up for whichever specific deficiency or loss is present

Definitions

  1. The replacement of a substance at a level less than what makes up for whichever specific deficiency or loss is present

Ancestry of “underreplacement”, step by step

underreplacement traces back through two separate lines of ancestry.

via English replacement

StepLanguageWordMeaning
1EnglishreplacementA person or thing that takes the place of...
2EnglishreplaceTo restore to a former place, position,...
3Englishre-again, anew; a completive or intensification of...
4Middle Englishre-
5Old Frenchre-re- again; once more
6Latinrĕ-back, backwards
7Latinprōdūcōto lead or bring forth, forward or out
8Latinprō-forward direction, forward movement
9Proto-Italic*pro-pro- see the Latin entry for further meanings
10Proto-Indo-Europeanpro-toward, forward
11Proto-Indo-Europeanpor-to give birth; forward, through; going, passage
12Proto-Indo-Europeanper-before, in front; first; to go through
13Proto-Indo-Europeanpr̥tóspassed , crossed

via English under

StepLanguageWordMeaning
1EnglishunderIn or at a lower level than; As a subject of;...
2Middle Englishunderunder
3Old Englishunderunder, beneath
4Proto-Germanicunderamong, between; under, beneath; under
5Proto-Indo-Europeanh₁entérbetween
6Proto-Indo-Europeanh₁enin; in, inside
Every word from Proto-Indo-European pr̥tós