Where does “oidhche mhath” come from?

oidhche mhath (Scottish Gaelic) comes from Scottish Gaelic math, from Old Irish maith, from Proto-Celtic matis, from Serbo-Croatian matematika, from Latin mathēmatica, from Latin mathēmaticus, from Ancient Greek μαθηματικός, from Ancient Greek -ικός — -y, -ic.

oidhche mhath (Scottish Gaelic): good night

Definitions

  1. good night

Ancestry of “oidhche mhath”, step by step

oidhche mhath traces back through two separate lines of ancestry.

via Scottish Gaelic math

StepLanguageWordMeaning
1Scottish Gaelicmathgood; well; advantage, profit, use, utility
2Old Irishmaithgood; third-person singular present indicative...
3Proto-Celticmatisgood
4Serbo-Croatianmatematikamathematics
5Latinmathēmaticamathematics
6LatinmathēmaticusOf or pertaining to mathematics; mathematical
7Ancient Greekμαθηματικόςscientific, esp. mathematical; astronomical;...
8Ancient Greek-ικόςof or pertaining to, in the manner of; -ic
9Ancient Greek-κόςforms adjectives with the sense of 'of or...
10Proto-Indo-European-ḱos-y, -ic

via Scottish Gaelic oidhche

StepLanguageWordMeaning
1Scottish Gaelicoidhchenight
2Old Irishaidchegenitive singular/dual/plural of adaig
3Old Irishadaignight; For quotations using this term, see...
4Old Irishaigidto drive
5Proto-Celticagetito drive
6Proto-Indo-Europeanh₂éǵetito be driving
7Proto-Indo-Europeanh₂eǵ-to drive
Every word from Proto-Indo-European -ḱosEvery word from Ancient Greek -ικόςEvery word from Ancient Greek -κός