Where does “unnecessarily” come from?

Unnecessarily derives from English unnecessary, itself from Latin necessārius (needed), composed of Latin ne- (not) and Latin cessāre (to cease), ultimately tracing to Proto-Indo-European roots meaning restraint and obligation.

unnecessarily (English): In an unnecessary way; not by necessity; To an...

Definitions

  1. In an unnecessary way; not by necessity; To an...

Ancestry of “unnecessarily”, step by step

unnecessarily traces back through two separate lines of ancestry.

via English necessarily

StepLanguageWordMeaning
1EnglishnecessarilyInevitably; of necessity
2EnglishnecessaryRequired, essential, whether logically...
3Middle Englishnecessarye
4Old Frenchnecessaire
5Latinnecessāriusunavoidable, inevitable
6Latinnecesseunavoidable, "particularly"
7Latincessusconceded, given up, granted, surrendered,...
8Latincēdōto go, move, proceed, go along, move along
9Proto-Italickedōgive here!
10Proto-Italickehere
11Indo-European*ḱe

via English unnecessary

StepLanguageWordMeaning
1EnglishunnecessaryNot needed or necessary; Done in addition to...
2EnglishUn-not
3Middle Englishun-
4Old Englishun-negation or absence of: un-, non-; bad; forms...
5Proto-West Germanicun-not, un-
6Proto-Germanicun-not, un-
7Proto-Indo-Europeann̥-not, un-
8Proto-Indo-Europeannenot
Every word from Indo-European *ḱeEvery word from Proto-Italic keEvery word from Proto-Italic kedō