Where does “baby-to-be” come from?

baby-to-be (English) comes from English to-be, from English to, from Middle English to, from Middle English tone, from Latin tonus, from Ancient Greek τόνος, from Proto-Hellenic tónos, from Proto-Indo-European tónos — to stretch, to extend.

baby-to-be (English): An embryo or fetus; an unborn child

Definitions

  1. An embryo or fetus; an unborn child

Ancestry of “baby-to-be”, step by step

baby-to-be traces back through two separate lines of ancestry.

via English to-be

StepLanguageWordMeaning
1Englishto-beThe future, that which is to come
2EnglishtoA particle used for marking the following verb as...
3Middle Englishtotoe; to; too
4Middle Englishtonethe one
5LatintonusThe stretching or straining of a rope; A strain;...
6Ancient Greekτόνοςrope, cord; chord; tone, note
7Proto-Hellenictónosrope, cord; tension
8Proto-Indo-Europeantónossomething stretched; chord, fiber, string
9Proto-Indo-Europeanten-to stretch, to extend

via English baby

StepLanguageWordMeaning
1EnglishbabyA very young human, particularly from birth to a...
2Middle EnglishbabyA child or baby
3Middle English-yDesignates an adjective, in many cases formed by...
4Old English-iġ-y, -ic
5Proto-West Germanic-gForms adjectives from nouns and verbs with a...
6Proto-Germanic-gaz-y
7Proto-Indo-European-ḱos-y, -ic
Every word from Proto-Indo-European ten-Every word from Proto-Indo-European tónosEvery word from Proto-Hellenic tónos