Where does “coreachable” come from?

coreachable (English) comes from English co, from English company, from Middle English companye, from Old French compaignie, from Old French compain, from Latin compāniō, from Latin com-, from Latin con- — resin, gum; to say, speak.

coreachable (English): Mutually reachable, that is, for any two nodes n1 and n2, they are coreachable iff n1 is reachable from n2 and n2 is reachable from n1

Definitions

  1. Mutually reachable, that is, for any two nodes n1 and n2, they are coreachable iff n1 is reachable from n2 and n2 is reachable from n1

Ancestry of “coreachable”, step by step

coreachable traces back through two separate lines of ancestry.

via English co

StepLanguageWordMeaning
1EnglishcoClipping of company; they; them
2EnglishcompanyA team; a group of people who work together...
3Middle EnglishcompanyeA company, band, small group, or team of people;...
4Old Frenchcompaigniecompanionship
5Old FrenchcompainAlternative form of compaing; friend; companion
6Latincompāniōcomrade
7Latincom-allomorph of con-
8Latincon-Used in compounds to indicate a being or bringing...
9Latincumwith, along with; at; -fold
10Old LatincomAlternative form of cum
11Proto-Italickomwith, along, at
12Proto-Indo-Europeanḱómbeside, near, by, with
13Proto-Indo-EuropeanḱeDeictic particle, here; Post-positional...
14Middle Englishkyt
15Germankittputty certain kinds of cement used for fixing e.g. window panes
16Old High Germankuti
17Proto-West Germanickwidugum, resin
18Proto-Germanickweduzresin
19Proto-Indo-Europeangʷet-resin, gum; to say, speak

via English reachable

StepLanguageWordMeaning
1EnglishreachableWithin easy reach; accessible; That may be...
2EnglishreachTo extend, stretch, or thrust out; To give to...
3Middle Englishrechen
4Old Englishrǣċanto reach
5Proto-Germanicrakjanąto stretch, to straighten
6Proto-Indo-Europeanh₃roǵéyetito straighten, to make straight, to cause to be...
7Proto-Indo-European-éyetiForms causative imperfective verbs from roots;...
8Proto-Indo-European-yetiCreates transitive imperfective verbs from roots
Every word from Proto-Indo-European gʷet-