Where does “rearguard action” come from?

rearguard action (English) comes from English action, from Middle English accioun, from Old French aucion, from Latin āctiō, from Latin -tiō, from Latin dissertātiō, from Latin dissertus, from Latin disserere — small stone, pebble; gravel, rubble.

rearguard action (English): An offensive action by a rearguard

Definitions

  1. An offensive action by a rearguard

Ancestry of “rearguard action”, step by step

rearguard action traces back through two separate lines of ancestry.

via English action

StepLanguageWordMeaning
1EnglishactionSomething done, often so as to accomplish a...
2Middle EnglishacciounAn action; an act, behaviour or attribute
3Old Frenchaucionaction; act; deed
4Latināctiōaction; a doing or performing, behavior
5Latin-tiōtion, -ation, -ing
6Latindissertātiō(spoken) dissertation, discourse, disquisition
7Latindissertusarranged, disposed; explained
8Latindissereresecond-person singular future passive indicative...
9Latindis-asunder, apart, in two; reversal, removal;...
10Latincalceusshoe
11Latincalxlimestone; chalk; the finish line
12Ancient Greekχάλιξsmall stone, pebble; gravel, rubble

via English rearguard

StepLanguageWordMeaning
1EnglishrearguardThe rearmost part of a force, especially a...
2EnglishguardA person who, or thing that, protects or watches...
3Middle Englishgardeguardianship, safeguarding, covering, authority;...
4Old Frenchguardeprotection; act of protecting; guard; inflection...
5Old Frenchguarderto protect; to guard; to look at
6Frankishwardēnto protect; to guard, protect, watch over; to...
7Proto-Germanicwardānąto guard, protect, watch over
8Proto-Germanic*warduz
9Proto-Indo-Europeanwēr-true
10Proto-Indo-Europeanwer-to burn; to cover, heed, notice; squirrel
Every word from Ancient Greek χάλιξEvery word from Latin -tiōEvery word from Latin dis-