Where does “prophylactically” come from?

prophylactically (English) comes from English ally, from Middle English allie, from Middle English allien, from Old French alier, from Latin alligō, from Latin ad-, from Latin īn-, from Latin în — in.

prophylactically (English): Preventively

Definitions

  1. Preventively

Ancestry of “prophylactically”, step by step

prophylactically traces back through two separate lines of ancestry.

via English ally

StepLanguageWordMeaning
1EnglishallyTo unite, or form a connection between, as...
2Middle EnglishallieThe state of having marital or family relations...
3Middle EnglishallienTo ally; to make a pact or confederacy; To marry...
4Old Frenchalierto unite; to join together
5Latinalligōto bind to, up or around something, tie, fetter, fasten; bandage
6Latinad-to; usually prefixed to verbs, in which cases it...
7Latinīn-un-, non-, not
8Latinînin, at, on, upon, from (space)
9Latinenlookǃ beholdǃ; reallyǃ?; come onǃ
10Proto-Italicenin
11Proto-Indo-Europeanh₁énin

via English prophylactic

StepLanguageWordMeaning
1EnglishprophylacticA medicine which preserves or defends against...
2Latinprophylacticus
3Ancient Greekπροφυλακτικόςprophylactic
4Ancient Greek-ικόςof or pertaining to, in the manner of; -ic
5Ancient Greek-κόςforms adjectives with the sense of 'of or...
6Proto-Indo-European-ḱos-y, -ic
Every word from Proto-Indo-European h₁én
prophylactically — Etymology, Origin & Word History | Etymology Explorer